If you guys don't know about this already, this is an easy way to create drum tracks. It's called Beatcraft. I downloaded the trial version, watched the "video tutorial" and within minutes, I create a cool basic rock track. Its easy to use, and the rock kit I selected, also in the tutorial, sounds pretty good. Create, edit and render track to .wav file then convert to mp3 for recording!
http://www.acoustica.com/beatcraft/
I think its worth the price to buy.