Look, I have a ThinkPad R50. Pentium M CPU @ 1,5 and 1MB L2 with the mobility 7500 32 MB and 512MB-Ram.
I can run any game I want (even UT2004 @ 800X600 full detail) with a FPS 30-40.
Far Cry you will be able to play only with a DirectX 9 compilant card 'cuz it uses a full DX9 code - so having a 8500 will not help for that game, if you want to play it you must at least have a Radeon Mobility 9600.