Hmm ok here you go try this ..............
(this did sort fellow subsim gtx/gt/gts users and vista x64 nvlddmkm.sys probs and random bsod's)
Get and install Driver Sweeper latest version
Driver to use (removed 1st part of addy add h**p

) ://files.filefront.com/WinVista6417726rar/;10612722;/fileinfo.html
Method, Install DriverSweeper
1: From vista control panel, programmes and features, Remove the vidcard drivers there,
2: Reboot into Safe Mode (keep tapping F8 as pc reboots and choose Safe)
3: Use Drivesweeper and remove the card drivers, CLOSE Drivesweeper and do the removal again !!
5: Find where the previous driver root folder was EG: C:\NVIDIA (find the nvidia folder) now delete this folder
5: Restart PC and it will bootup normal, If you're asked to install anything just click No etc
6: Now in to desktop, In the driver folder you opened sometime ago Start the install by using the normal Setup.exe
Do Not worry about the Asus Bitmap image (they leaked the drivers you see lol)
7: Follow any prompts to reboot etc
Just copied from a post i did but you should get the drift of it
Ciao
Def
ps: post back if any probs, and drivers are the 177.26 with modded inf
pps: Have tried later modded 177.** drivers but all cwap so far
