If you haven't got them yet you should need kernel sources from http://http://backtrack.offensive-security.com/index.php/Main_Page
but what you are describing does not even sound like that problem yet. And you could already have done that but saying your n00b at this I assumed you did not.
there are two other posts that I used to get compiz working on my laptop with ATI 200m in here (search compiz and ATI). good luck. If you post again please provide more details, it will help others understand your problem. what hardware is it? I am assuming this is on hard drive install as well.