i REALLY recommend not using the track pad to play call of duty 4. unless you are really really good with the track pad and single click mouse, you will get massecered (i know i cant spell). you should get a two button mouse with a scroll wheel. i use left mouse as attack, right as aim down sight, scroll up as reload and down as switch to secondary. clicking the scroll button is frag.
as you can see, the mouse is a really important part of the game and it's gonna be hard to play without one.
i dont know other games to play with the controller that you bought.