diff --git a/lb_common.lua b/lb_common.lua
index 5ca198e..9a11c3e 100644
--- a/lb_common.lua
+++ b/lb_common.lua
@@ -1,3 +1,17 @@
+rawset(_G, "lb_score_t", function(map, name, skin, color, time, splits, flags, stat, checksum)
+	return {
+		["map"]    = map,
+		["name"]   = name,
+		["skin"]   = skin,
+		["color"]  = color,
+		["time"]   = time,
+		["splits"] = splits,
+		["flags"]  = flags,
+		["stat"] = stat,
+		["checksum"] = checksum
+	}
+end)
+
 rawset(_G, "lb_TicsToTime", function(tics, pure)
 	if tics == 0 and pure then
 		return "-:--:--"
@@ -64,3 +78,32 @@ rawset(_G, "lb_map_checksum", function(mapnum)
 	local digest = string.format("%04x", djb2(mh.lvlttl..mh.subttl..mh.zonttl))
 	return string.sub(digest, #digest - 3)
 end)
+
+rawset(_G, "lb_mapnum_from_extended", function(map)
+	local p, q = map:upper():match("MAP(%w)(%w)$", 1)
+	if not (p and q) then
+		return nil
+	end
+
+	local mapnum = 0
+	local A = string.byte("A")
+
+	if tonumber(p) != nil then
+		-- Non extended map numbers
+		if tonumber(q) == nil then
+			return nil
+		end
+		mapnum = tonumber(p) * 10 + tonumber(q)
+	else
+		--Extended map numbers
+		p = string.byte(p) - A
+		local qn = tonumber(q)
+		if qn == nil then
+			qn = string.byte(q) - A + 10
+		end
+
+		mapnum = 36 * p + qn + 100
+	end
+
+	return mapnum
+end)
diff --git a/lb_store.lua b/lb_store.lua
index dfe867f..4dc80d2 100644
--- a/lb_store.lua
+++ b/lb_store.lua
@@ -5,11 +5,14 @@
 -- lb_common.lua
 local stat_t = lb_stat_t
 local lbComp = lb_comp
+local score_t = lb_score_t
 local mapChecksum = lb_map_checksum
+local mapnumFromExtended = lb_mapnum_from_extended
 
 ----------------------------
 
 local LEADERBOARD_FILE = "leaderboard.txt"
+local COLDSTORE_FILE = "leaderboard.coldstore.txt"
 
 -- ColdStore are records loaded from lua addons
 -- this table should never be modified outside of the AddColdStore function
@@ -21,6 +24,67 @@ local LiveStore = {}
 -- parse score function
 local parseScore
 
+local MSK_SPEED = 0xF0
+local MSK_WEIGHT = 0xF
+local function stat_str(stat)
+	if stat then
+		return string.format("%d%d", (stat & MSK_SPEED) >> 4, stat & MSK_WEIGHT)
+	end
+
+	return "0"
+end
+
+local function isSameRecord(a, b, modeSep)
+	return a.name == b.name and (a.flags & modeSep) == (b.flags & modeSep)
+end
+
+-- insert or replace the score in dest
+local function insertOrReplace(dest, score, modeSep)
+	for i, record in ipairs(dest) do
+		if isSameRecord(record, score, modeSep) then
+			if lbComp(score, record) then
+				dest[i] = score
+			end
+			return
+		end
+	end
+
+	table.insert(dest, score)
+end
+
+local function dumpStoreToFile(filename, store)
+	local f = assert(
+		io.open(filename, "w"),
+		"Failed to open file for writing: "..filename
+	)
+
+	f:setvbuf("line")
+
+	for mapid, checksums in pairs(store) do
+		for checksum, records in pairs(checksums) do
+			for _, record in ipairs(records) do
+				if not record.checksum or record.checksum == "" then
+					record.checksum = mapChecksum(record.map) or ""
+				end
+
+				f:write(
+					mapid, "\t",
+					record.name, "\t",
+					record.skin, "\t",
+					record.color, "\t",
+					record.time, "\t",
+					table.concat(record.splits, " "), "\t",
+					record.flags, "\t",
+					stat_str(record.stat), "\t",
+					record.checksum, "\n"
+				)
+			end
+		end
+	end
+
+	f:close()
+end
+
 -- GLOBAL
 -- Returns a list of all maps with records
 local function MapList()
@@ -115,76 +179,19 @@ local function GetMapRecords(map, checksum, modeSep)
 end
 rawset(_G, "lb_get_map_records", GetMapRecords)
 
-local function insertOrReplaceRecord(map, score, modeSep)
+-- GLOBAL
+-- Save a record to the LiveStore and write to disk
+-- SaveRecord will replace the record holders previous record
+local function SaveRecord(score, map, modeSep)
 	local checksum = mapChecksum(map)
 	LiveStore[map] = $ or {}
 	LiveStore[map][checksum] = $ or {}
-
-	for i, record in ipairs(LiveStore[map][checksum]) do
-		-- Replace the record 
-		if record.name == score.name
-			and (record.flags & modeSep) == (score.flags & modeSep) then
-			LiveStore[map][checksum][i] = score
-			return
-		end
-	end
-
-	table.insert(LiveStore[map][checksum], score)
-
-	-- TODO: remove excess records
-end
-
-local MSK_SPEED = 0xF0
-local MSK_WEIGHT = 0xF
-local function stat_str(stat)
-	if stat then
-		return string.format("%d%d", (stat & MSK_SPEED) >> 4, stat & MSK_WEIGHT)
-	end
-
-	return "0"
-end
-
--- GLOBAL
--- Save a record to the LiveStore and write to disk
--- SaveRecord will replace the record holders previous record but it will not compare any record times
-local function SaveRecord(score, map, modeSep)
-	insertOrReplaceRecord(map, score, modeSep)
+	insertOrReplace(LiveStore[map][checksum], score, modeSep)
 
 	print("Saving score")
-
-	if not isserver then return end
-
-	local f = assert(
-		io.open(LEADERBOARD_FILE, "w"),
-		"Failed to open file for writing: "..LEADERBOARD_FILE
-	)
-
-	f:setvbuf("line")
-
-	for mapid, checksums in pairs(LiveStore) do
-		for checksum, records in pairs(checksums) do
-			for _, record in ipairs(records) do
-				-- Insert checksum if missing
-				if (not record.checksum) or record.checksum == "" then
-					record.checksum = mapChecksum(mapid)
-				end
-
-				f:write(
-					mapid, "\t",
-					record.name, "\t",
-					record.skin, "\t",
-					record.color, "\t",
-					record.time, "\t",
-					table.concat(record.splits, " "), "\t",
-					record.flags, "\t",
-					stat_str(record.stat), "\t",
-					record.checksum or "", "\n"
-				)
-			end
-		end
+	if isserver then 
+		dumpStoreToFile(LEADERBOARD_FILE, LiveStore)
 	end
-
-	f:close()
 end
 rawset(_G, "lb_save_record", SaveRecord)
 
@@ -194,20 +201,6 @@ end
 
 addHook("NetVars", netvars)
 
-local function score_t(map, name, skin, color, time, splits, flags, stat, checksum)
-	return {
-		["map"]    = map,
-		["name"]   = name,
-		["skin"]   = skin,
-		["color"]  = color,
-		["time"]   = time,
-		["splits"] = splits,
-		["flags"]  = flags,
-		["stat"] = stat,
-		["checksum"] = checksum
-	}
-end
-
 function parseScore(str)
 	-- Leaderboard is stored in the following tab separated format
 	-- mapnum, name, skin, color, time, splits, flags, stat
@@ -237,7 +230,7 @@ function parseScore(str)
 		end
 	end
 
-	local checksum = t[9]
+	local checksum = t[9] or ""
 
 	return score_t(
 		tonumber(t[1]), -- Map
@@ -253,19 +246,145 @@ function parseScore(str)
 end
 rawset(_G, "lb_parse_score", parseScore)
 
--- Load the livestore
-if isserver then
+-- Read and parse a store file
+local function loadStoreFile(filename)
 	local f = assert(
-		io.open(LEADERBOARD_FILE, "r"),
-		"Failed to open file: "..LEADERBOARD_FILE
+		io.open(filename, "r"),
+		"Failed to open file for reading: "..filename
 	)
 
+	local store = {}
+
 	for l in f:lines() do
 		local score = parseScore(l)
-		LiveStore[score.map] = $ or {}
-		LiveStore[score.map][score.checksum] = $ or {}
-		table.insert(LiveStore[score.map][score.checksum], score)
+		store[score.map] = $ or {}
+		store[score.map][score.checksum] = $ or {}
+		table.insert(store[score.map][score.checksum], score)
 	end
 
 	f:close()
+
+	return store
+end
+
+-- GLOBAL
+-- Command for moving records from one map to another
+local function moveRecords(from, to, modeSep)
+	local function moveRecordsInStore(store)
+		if not (store[from.id] and store[from.id][from.checksum]) then
+			return 0
+		end
+
+		local moveCount = #store[from.id][from.checksum]
+
+		store[to.id] = $ or {}
+		store[to.id][to.checksum] = $ or {}
+		for i, score in ipairs(store[from.id][from.checksum]) do
+			score.map = to.id
+			score.checksum = to.checksum
+			insertOrReplace(store[to.id][to.checksum], score, modeSep)
+		end
+
+		-- Destroy the original table
+		store[from.id][from.checksum] = nil
+
+		return moveCount
+	end
+
+	-- move livestore records and write to disk
+	local moveCount = moveRecordsInStore(LiveStore)
+	dumpStoreToFile(LEADERBOARD_FILE, LiveStore)
+
+	-- move coldstore records
+	if isserver then
+		local ok, coldstore = pcall(loadStoreFile, COLDSTORE_FILE)
+		if ok and coldstore then
+			moveRecordsInStore(coldstore)
+			dumpStoreToFile(COLDSTORE_FILE, coldstore)
+		end
+	end
+
+	return moveCount
+end
+rawset(_G, "lb_move_records", moveRecords)
+
+-- Helper function for those upgrading from 1.2 to 1.3
+COM_AddCommand("lb_write_checksums", function(player)
+	local count = 0
+	local moved = {}
+
+	-- Gather movable records (no checksum, map loaded)
+	for map, checksums in pairs(LiveStore) do
+		for checksum, records in pairs(checksums) do
+			if checksum == "" then
+				local sum = mapChecksum(map)
+
+				if not sum then continue end
+
+				moved[map] = {}
+				moved[map][sum] = {}
+
+				for i, record in ipairs(records) do
+					record.checksum = sum
+					table.insert(moved[map][sum], record)
+				end
+			end
+		end
+	end
+
+	-- Write moved to livestore
+	for map, checksums in pairs(moved) do
+		LiveStore[map] = $ or {}
+		for checksum, records in pairs(checksums) do
+			LiveStore[map][checksum] = $ or {}
+			for i, score in ipairs(records) do
+				table.insert(LiveStore[map][checksum], score)
+			end
+			count = $ + #records
+		end
+		LiveStore[map][""] = nil
+	end
+
+	if isserver then
+		dumpStoreToFile(LEADERBOARD_FILE, LiveStore)
+	end
+
+	CONS_Printf(player, string.format("Successful operation on %d records", count))
+end, COM_ADMIN)
+
+COM_AddCommand("lb_known_maps", function(player, map)
+	if not map then
+		CONS_Printf(player, "Usage: <map>")
+		CONS_Printf(player, "Print all known checksums under <map>")
+		return
+	end
+
+	local mapnum = mapnumFromExtended(map)
+	if not mapnum then
+		CONS_Printf(player, string.format("invalid map '%s'", map))
+		return
+	end
+
+	local known = {}
+
+	if LiveStore[mapnum] then
+		for checksum, records in pairs(LiveStore[mapnum]) do
+			known[checksum] = #records
+		end
+	end
+	if ColdStore[mapnum] then
+		for checksum, records in pairs(ColdStore[mapnum]) do
+			known[checksum] = $ or 0 + #records
+		end
+	end
+
+	CONS_Printf(player, "Map     Chck   Records")
+	for checksum, count in pairs(known) do
+		CONS_Printf(player, string.format("%s   %s   %d", map, checksum, count))
+	end
+end)
+
+-- Load the livestore
+if isserver then
+	LiveStore = loadStoreFile(LEADERBOARD_FILE)
 end
diff --git a/leaderboard.lua b/leaderboard.lua
index e08cb70..efdd173 100644
--- a/leaderboard.lua
+++ b/leaderboard.lua
@@ -1,6 +1,28 @@
 -- Leaderboards written by Not
 -- Reusable
 
+---------- Imported functions -------------
+-- lb_common.lua
+local ticsToTime = lb_TicsToTime
+local zoneAct = lb_ZoneAct
+local stat_t = lb_stat_t
+local lbComp = lb_comp
+local mapChecksum = lb_map_checksum
+local score_t = lb_score_t
+local mapnumFromExtended = lb_mapnum_from_extended
+
+-- browser.lua
+local InitBrowser = InitBrowser
+local DrawBrowser = DrawBrowser
+local BrowserController = BrowserController
+
+-- lb_store.lua
+local GetMapRecords = lb_get_map_records
+local SaveRecord = lb_save_record
+local MapList = lb_map_list
+local MoveRecords = lb_move_records
+--------------------------------------------
+
 -- Holds the current maps records table including all modes
 local MapRecords = {}
 
@@ -85,25 +107,6 @@ local scroll_to
 
 local allowJoin
 
--- Imported functions --
-
--- lb_common.lua
-local ticsToTime = lb_TicsToTime
-local zoneAct = lb_ZoneAct
-local stat_t = lb_stat_t
-local lbComp = lb_comp
-local mapChecksum = lb_map_checksum
-
--- browser.lua
-local InitBrowser = InitBrowser
-local DrawBrowser = DrawBrowser
-local BrowserController = BrowserController
-
--- lb_store.lua
-local GetMapRecords = lb_get_map_records
-local SaveRecord = lb_save_record
-local MapList = lb_map_list
----------------
 
 -- cvars
 local cv_teamchange
@@ -182,19 +185,6 @@ local cv_spb_separate = CV_RegisterVar({
 	end
 })
 
-local function score_t(map, name, skin, color, time, splits, flags, stat)
-	return {
-		["map"]    = map,
-		["name"]   = name,
-		["skin"]   = skin,
-		["color"]  = color,
-		["time"]   = time,
-		["splits"] = splits,
-		["flags"]  = flags,
-		["stat"] = stat
-	}
-end
-
 local MSK_SPEED = 0xF0
 local MSK_WEIGHT = 0xF
 
@@ -343,35 +333,6 @@ local function findMap(player, ...)
 end
 COM_AddCommand("findmap", findMap)
 
-local function mapnumFromExtended(map)
-	local p, q = map:upper():match("MAP(%w)(%w)$", 1)
-	if not (p and q) then
-		return nil
-	end
-
-	local mapnum = 0
-	local A = string.byte("A")
-
-	if tonumber(p) != nil then
-		-- Non extended map numbers
-		if tonumber(q) == nil then
-			return nil
-		end
-		mapnum = tonumber(p) * 10 + tonumber(q)
-	else
-		--Extended map numbers
-		p = string.byte(p) - A
-		local qn = tonumber(q)
-		if qn == nil then
-			qn = string.byte(q) - A + 10
-		end
-
-		mapnum = 36 * p + qn + 100
-	end
-
-	return mapnum
-end
-
 local SPBModeSym = {
 	[F_SPBEXP] = "X",
 	[F_SPBBIG] = "B",
@@ -683,6 +644,50 @@ local function findRival(player, ...)
 end
 COM_AddCommand("rival", findRival)
 
+local function moveRecords(player, from_map, from_checksum, to_map, to_checksum)
+	if not(from_map and from_checksum and to_map) then
+		CONS_Printf(player, "Usage: lb_move_records <from_map> <from_checksum> <to_map> [<to_checksum>]")
+		CONS_Printf(
+			player,
+			string.format(
+				"Summary: Move records from one map to another.\n"..
+				"If no <to_checksum> is supplied then the checksum of the current loaded map %s is used.\n"..
+				"Hint: Use lb_known_maps to find checksums",
+				to_map or "<to_map>"
+			)
+		)
+		return
+	end
+
+	local from = {
+		["id"] = mapnumFromExtended(from_map),
+		["checksum"] = from_checksum
+	}
+
+	local to = {
+		["id"] = mapnumFromExtended(to_map),
+	}
+	to.checksum = to_checksum or mapChecksum(to.id)
+
+	if not to.checksum then
+		CONS_Printf(player, string.format("error: '%s' is missing; provide to_checksum to continue", to.id))
+		return
+	end
+
+	CONS_Printf(
+		player,
+		string.format(
+			"%d records have been moved from %s %s to %s %s",
+			MoveRecords(from, to, ST_SEP),
+			from_map, from.checksum,
+			to_map, to.checksum
+		)
+	)
+
+	CONS_Printf(player, "Please repack coldstore and restart the server for changes to take effect.")
+end
+COM_AddCommand("lb_move_records", moveRecords)
+
 --DEBUGGING
 --local function printTable(tb)
 --	for mode, tbl in pairs(tb) do
@@ -1192,12 +1197,12 @@ local function saveTime(player)
 end
 
 -- DEBUGGING
---local function saveLeaderboard(player, ...)
---	TimeFinished = tonumber(... or player.realtime)
---	splits = {1000, 2000, 3000}
---	saveTime(player)
---end
---COM_AddCommand("save", saveLeaderboard)
+local function saveLeaderboard(player, ...)
+	TimeFinished = tonumber(... or player.realtime)
+	splits = {1000, 2000, 3000}
+	saveTime(player)
+end
+COM_AddCommand("save", saveLeaderboard)
 
 local function regLap(player)
 	if player.laps > prevLap and TimeFinished == 0 then