I have an HP Pavilion dv8000 laptop which has plenty of RAM. I like 1st person shooter games-have played the 1st HALO, Far Cry, Call to Duty, I have been told that the problems I'm encountering with the NEXT versions of the game is due to my GRAPHICS card(ATI RadeonExpress 200M). I REALIZE That HALO requires VISTA. My question is: what games can I play or is there a chart that shows what the 200M is equal too?You can always check the game requirements.

This is a good website to test games on your laptop:
http://www.systemrequirementslab.com/referrer/srtest

Another thing, Halo 1 works on XP. Halo 2 is Vista-Only.A lot of games will run slowly or not at all on that laptop.
Halo and Far Cry will play on low/medium settings, Call of Duty (original) should be OK but CoD 2 upwards will struggle.
The 200M is quite a low-end card, roughly equivalent to the DESKTOP Radeon 9200, X300, or Geforce FX5200.
Integrated graphics, especially on laptops like yours, are not meant for gaming - if you want to enjoy these games, I recommend you find an alternative (console, or a better computer).
Hope this helps, and welcome to the forums.