I'm using a Steam copy of the game, followed the instructions regarding re-dating the 3 .bsa files, followed the youtube video guide for installation to the T, etc. The game launches, and I can start a new game or load a previous save, but once loaded there is only a black screen. I can hear the audio fine, so the world is there, I'm just not seeing it. I also get a black square around the cursor when in the main menu. This problem now persists even if I disable all custom Data Files. Anyone know how to troubleshoot this?

specs:

Win7 Ult 64
e8400 @ 3.2ghz
GTX 260
4 gb ram