Hammer Editor Windows 7 64bit Common Issue...

"GameInfo"
{
	game	"TF2 SteamPipe Beta"
	type multiplayer_only
	nomodels 1
	nohimodel 1
	nocrosshair 0
	hidden_maps
	{
		"test_speakers"		1
		"test_hardware"		1
	}
	nodegraph 0
	GameData	"tf.fgd"
	InstancePath "maps/instances/"
	advcrosshair 1


	FileSystem
	{
		SteamAppId				440		// This will mount all the GCFs we need (240=CS:S, 220=HL2).
		ToolsAppId				211		// Tools will load this (ie: source SDK caches) to get things like materials\debug, materials\editor, etc.
		
		//
		// The code that loads this file automatically does a few things here:
		//
		// 1. For each "Game" search path, it adds a "GameBin" path, in <dir>\bin
		// 2. For each "Game" search path, it adds another "Game" path in front of it with _<langage> at the end.
		//    For example: c:\hl2\cstrike on a french machine would get a c:\hl2\cstrike_french path added to it.
		// 3. For the first "Game" search path, it adds a search path called "MOD".
		// 4. For the first "Game" search path, it adds a search path called "DEFAULT_WRITE_PATH".
		//

		//
		// Search paths are relative to the base directory, which is where hl2.exe is found.
		//
		// |gameinfo_path| points at the directory where gameinfo.txt is.
		// We always want to mount that directory relative to gameinfo.txt, so
		// people can mount stuff in c:\mymod, and the main game resources are in
		// someplace like c:\program files\valve\steam\steamapps\half-life 2.
		//
		SearchPaths
		{
			Game				|gameinfo_path|.
			Game				tf
			Game				|all_source_engine_paths|hl2
		}
	}
}