anchor.diff:  
   
   local function get_runtime()
  -    local f
  +	local f
   	vars.LUA_RUNTIME, f = pe.msvcrt(vars.LUA_BINDIR.."\\"..vars.LUA_INTERPRETER)
   	if type(vars.LUA_RUNTIME) ~= "string" then
   		-- analysis failed, issue a warning
   		vars.LUA_RUNTIME = "MSVCR80"
   		print("*** WARNING ***: could not analyse the runtime used, defaulting to "..vars.LUA_RUNTIME)
  -    else
  +	else
   		print("    "..f.." uses "..vars.LUA_RUNTIME..".DLL as runtime")
   	end
   	return true
   end
   
   local function get_architecture()
  -    -- detect processor arch interpreter was compiled for
  -    local proc = (pe.parse(vars.LUA_BINDIR.."\\"..vars.LUA_INTERPRETER) or {}).Machine
  -    if not proc then
  -        die("Could not detect processor architecture used in "..vars.LUA_INTERPRETER)
  -    end
  -    proc = pe.const.Machine[proc]  -- collect name from constant value
  -    if proc == "IMAGE_FILE_MACHINE_I386" then
  -        proc = "x86"
  -    else
  -        proc = "x86_64"
  -    end
  -    return proc
  +	-- detect processor arch interpreter was compiled for
  +	local proc = (pe.parse(vars.LUA_BINDIR.."\\"..vars.LUA_INTERPRETER) or {}).Machine
  +	if not proc then
  +		die("Could not detect processor architecture used in "..vars.LUA_INTERPRETER)
  +	end
  +	proc = pe.const.Machine[proc]  -- collect name from constant value
  +	if proc == "IMAGE_FILE_MACHINE_I386" then
  +		proc = "x86"
  +	else
  +		proc = "x86_64"
  +	end
  +	return proc
   end
   
   local function look_for_lua_install ()
  
positive.code: 	["/BIN"] = true,
  	["/LIB"] = true,
  }
  local i = 1
  while i <= #arg do
  	local opt = arg[i]
  
negative.code: /P [dir]       (REQUIRED) Where to install. 
                 Note that version; $VERSION, will be
                 appended to this path.
  
  Configuring the destinations:
  /TREE [dir]    Root of the local tree of installed rocks.
                 Default is same place of installation
  /SCRIPTS [dir] Where to install commandline scripts installed by
                 rocks. Default is TREE/bin.
  
  Configuring the Lua interpreter:
  /LV [version]  Lua version to use; either 5.1 or 5.2.
                 Default is 5.1
  /LUA [dir]     Location where Lua is installed - e.g. c:\lua\5.1\
                 This is the base directory, the installer will look
                 for subdirectories bin, lib, include. Alternatively
  