diff --git a/projects/updater/install.lua b/projects/updater/install.lua
index af11425..881ab77 100644
--- a/projects/updater/install.lua
+++ b/projects/updater/install.lua
@@ -1,79 +1,95 @@
-args = {...}
+local args = {...}
 
-url = "http://lua.gaywine.org"
+local url = "http://lua.gaywine.org"
 
-path = "bin/"
+local path = "bin/"
 if not fs.exists(path) then
     fs.makeDir(path)
 end
-temp = "temp/"
+local temp = "temp/"
 if not fs.exists(temp) then
     fs.makeDir(temp)
 end
 
 if #args > 0 then
     programToInstall = args[1]
+else
+    print("usage:")
+    print("install.lua <project>")
+    print("install.lua <project> <custom install path>")
 end
 if #args > 1 then
+    print("WARNING: custom paths are currently not supported.")
     customPath = shell.resolve(args[2])
 end
 
-function downloadFile(filename)
-  fileUrl = url .. "/files/" .. programToInstall .. "/" .. filename
+local function downloadFile(filename)
+    print("downloading " .. filename .. "...")
+    local fileUrl = url .. "/files/" .. programToInstall .. "/" .. filename
 
-  result = http.get(fileUrl)
-  resultText = result.readAll()
+    local result = http.get(fileUrl)
+    local resultText = result.readAll()
 
-  file = fs.open(temp .. filename, "w")
-  file.write(resultText)
-  file.close()
+    local file = fs.open(temp .. filename, "w")
+    file.write(resultText)
+    file.close()
 end
 
-function split(pString, pPattern)
-   local Table = {}  -- NOTE: use {n = 0} in Lua-5.0
-   local fpat = "(.-)" .. pPattern
-   local last_end = 1
-   local s, e, cap = pString:find(fpat, 1)
-   while s do
-          if s ~= 1 or cap ~= "" then
-         table.insert(Table,cap)
-          end
-          last_end = e+1
-          s, e, cap = pString:find(fpat, last_end)
-   end
-   if last_end <= #pString then
-          cap = pString:sub(last_end)
-          table.insert(Table, cap)
-   end
-   return Table
+local function split(pString, pPattern)
+    local Table = {} -- NOTE: use {n = 0} in Lua-5.0
+    local fpat = "(.-)" .. pPattern
+    local last_end = 1
+    local s, e, cap = pString:find(fpat, 1)
+    while s do
+        if s ~= 1 or cap ~= "" then
+            table.insert(Table, cap)
+        end
+        last_end = e + 1
+        s, e, cap = pString:find(fpat, last_end)
+    end
+    if last_end <= #pString then
+        cap = pString:sub(last_end)
+        table.insert(Table, cap)
+    end
+    return Table
 end
 
-function getAllFiles()
-  indexesUrl = url .. "/indexes/" .. programToInstall
+local function getAllFiles()
+    local indexesUrl = url .. "/indexes/" .. programToInstall
 
-  result = http.get(indexesUrl)
-  resultText = result.readAll()
-  resultTable = split(resultText, "\n")
+    local result = http.get(indexesUrl)
+    local resultText = result.readAll()
+    local resultTable = split(resultText, "\n")
 
-  finalResult = {}
-  for key, value in ipairs(resultTable) do
-    finalResult[key] = split(value, " ")[1]
-  end
+    local indexesFile = fs.open("bin/indexes.dat", "w")
+    indexesFile.write(resultText)
+    indexesFile.close()
 
-  return finalResult
+    local programsFile = fs.open(path .. "programs.dat", "a")
+    programsFile.write(programToInstall)
+    programsFile.close()
+
+    local finalResult = {}
+    for key, value in ipairs(resultTable) do
+        finalResult[key] = split(value, " ")[1]
+    end
+
+    return finalResult
 end
 
-function finishInstall(files)
+local function finishInstall(files)
     for key, file in ipairs(files) do
         if customPath ~= nil then
+            print("moving " .. file .. " to " .. customPath .. "...")
             fs.move(temp .. file, customPath .. "/" .. file)
         else
-            fs.move(temp .. binary, path .. binary)
+            print("moving " .. file .. " to " .. path .. programToInstall .. "...")
+            fs.move(temp .. file, path .. programToInstall .. "/" .. file)
         end
     end
 
     if customPath ~= nil then
-        program = "shell.run(" .. customPath .. "/run.lua)"
+        local program = "shell.run(" .. customPath .. "/run.lua)"
         file = fs.open(path .. programToInstall .. "/run.lua")
         file.write(program)
         file.close()
@@ -82,8 +98,27 @@ function finishInstall(files)
     fs.delete(temp)
 end
 
-local files = getAllFiles()
-for _,value in ipairs(files) do
-  downloadFile(value)
+if not fs.exists(path .. "programs.dat") then
+  local file = fs.open(path .. "programs.dat", "w")
+  file.write("")
+  file.close()
+end
+local programsFile = fs.open(path .. "programs.dat", "r")
+local programsText = programsFile.readAll()
+local programsTable = split(programsText, "\n")
+local shouldInstall = true
+for _, value in ipairs(programsTable) do
+    if value == programToInstall then
+        print(programToInstall .. " is already installed. checking for updates instead...")
+        shouldInstall = false
+    end
+end
+if shouldInstall then
+    local files = getAllFiles()
+    for _, value in ipairs(files) do
+        downloadFile(value)
+    end
+    finishInstall(files)
+elseif fs.exists(path .. "updater/update.lua") then
+    shell.run(path .. "updater/update.lua " .. programToInstall)
 end
-finishInstall(files)
\ No newline at end of file
diff --git a/projects/updater/update.lua b/projects/updater/update.lua
index bfe699d..8b94b0d 100644
--- a/projects/updater/update.lua
+++ b/projects/updater/update.lua
@@ -1 +1,133 @@
-print('fuck')
\ No newline at end of file
+args = {...}
+
+url = "http://lua.gaywine.org"
+
+path = "bin/"
+if not fs.exists(path) then
+    fs.makeDir(path)
+end
+temp = "temp/"
+if not fs.exists(temp) then
+    fs.makeDir(temp)
+end
+
+if #args > 0 then
+    programToInstall = args[1]
+end
+if #args > 1 then
+    print("WARNING: custom paths are currently not supported.")
+    customPath = shell.resolve(args[2])
+end
+
+local function downloadFile(filename)
+    print("downloading " .. filename .. "...")
+    local fileUrl = url .. "/files/" .. programToInstall .. "/" .. filename
+
+    local result = http.get(fileUrl)
+    local resultText = result.readAll()
+
+    local file = fs.open(temp .. filename, "w")
+    file.write(resultText)
+    file.close()
+end
+
+local function split(pString, pPattern)
+    local Table = {} -- NOTE: use {n = 0} in Lua-5.0
+    local fpat = "(.-)" .. pPattern
+    local last_end = 1
+    local s, e, cap = pString:find(fpat, 1)
+    while s do
+        if s ~= 1 or cap ~= "" then
+            table.insert(Table, cap)
+        end
+        last_end = e + 1
+        s, e, cap = pString:find(fpat, last_end)
+    end
+    if last_end <= #pString then
+        cap = pString:sub(last_end)
+        table.insert(Table, cap)
+    end
+    return Table
+end
+
+local function getAllFiles()
+    local indexesUrl = url .. "/indexes/" .. programToInstall
+    local updateUrl = url .. "/updates/" .. programToInstall
+
+    local currentFiles = ""
+    if fs.exists(path .. "indexes.dat") then
+        local indexesFile = fs.open(path .. "indexes.dat", "r")
+        currentFiles = indexesFile.readAll()
+        indexesFile.close()
+    end
+
+    local result = http.post(indexesUrl, currentFiles)
+    local resultText = result.readAll()
+    local resultTable = split(resultText, "\n")
+
+    local result2 = http.get(indexesUrl)
+    local resultText2 = result2.readAll()
+    local resultTable2 = split(resultText2, "\n")
+
+    local newIndexesFile = fs.open(path .. "indexes.dat", "w")
+    newIndexesFile.write(resultText)
+    newIndexesFile.close()
+
+    local finalResult = {}
+    for key, value in ipairs(resultTable2) do
+        local filename = split(value, " ")[1]
+        for key2, value2 in ipairs(resultTable) do
+            local valueTable = split(value2, " ")
+            local filePath = path .. programToInstall .. "/" .. valueTable[1]
+            if valueTable[2] == "delete" and fs.exists(filePath) then
+                fs.delete(filePath)
+            elseif valueTable[2] == "download" then
+                finalResult[#finalResult + 1] = valueTable[1]
+            end
+        end
+    end
+
+    return finalResult
+end
+
+local function finishInstall(files)
+    for key, file in ipairs(files) do
+        if customPath ~= nil then
+            print("moving " .. file .. " to " .. customPath .. "...")
+            fs.move(temp .. file, customPath .. "/" .. file)
+        else
+            print("moving " .. file .. " to " .. path .. programToInstall .. "...")
+            fs.move(temp .. file, path .. programToInstall .. "/" .. file)
+        end
+    end
+
+    if customPath ~= nil then
+        local program = "shell.run(" .. customPath .. "/run.lua)"
+        file = fs.open(path .. programToInstall .. "/run.lua")
+        file.write(program)
+        file.close()
+    end
+
+    fs.delete(temp)
+end
+
+if programToInstall == nil then
+    print("no program specified, updating all...")
+    local programsFile = fs.open(path .. "programs.dat", "r")
+    local programsText = programsFile.readAll()
+    local programsTable = split(programsText, "\n")
+    for _, value in ipairs(programsTable) do
+        programToInstall = value
+        local files = getAllFiles()
+        for _, value in ipairs(files) do
+            downloadFile(value)
+        end
+        finishInstall(files)
+    end
+else
+    local files = getAllFiles()
+    for _, value in ipairs(files) do
+        downloadFile(value)
+    end
+    finishInstall(files)
+end