Nice one, Glad I could help. The game sure looks better at the correct resolution, and for Codemasters to restrict the setting that basically everybody changes when they install a new game, is weird. If you had two 256mb cards running in SLI you'd be screwed also.
I'm sure this will be fixed...
I've just solved this problem for a mate of mine who plays Grid via Steam, the fix is the same for the boxed copy and the download version.
For Steam go to Steam\Steamapps\common\grid\system.
For retail go to C:\Program Files\Codemasters\GRID\system.
Right click on...