Two Recommendations. The first and I think the best is Fruityloops. You can import your midi drums into it and then splice them up into seperate tracks. Great program and I think there is a free demo that does pretty much what you would need it to. Second is a little known program called Hotstepper. Hotstepper is a shareware program that 16 tracks of wav sequencing, plenty for drums. The only thing you can't do is save your sequence as a wav file (you can save it as a work file :)), but you can easily just use your mixer on your soundcard to just record it when you play the sequence back. Great program.

The only thing you'll have to do with these programs is you'll have to go to a sample site on the internet and download each individual drum sound. Which I think is cool because you can put together your own drumset. :) Both come with sample already but most are teachno ones. I like the real sounds better.

Fruitloops should be easy to find, just type it in any search browser. Hotsteppers link I believe is http://www.hotstepper.de. Check out http://www.samples.net and http://www.melodramatic.com for samples.