My work around till permanent fix.
I had same problem error on ageia driver install (error:-135 I think) I clicked ok and it rolled back the install of the drivers then finished the GRAW2 install.
It does not complete the install fully, no links to game in start menu or desktop, a few folders missing in install directory etc but game will run if u do following.
Find GRAW2.exe and create any shortcuts, desktop and start menu etc. Drag the ageia drivers to desktop and run, do not click ok on the error, just launch the game from the shortcut you created and it should load up.
Bummer installing drivers each time but it works for me, a fix would be nice so I can install game properly