Try downloading Reaper which I linked to in another thread. Unfortunately, Kristal only does audio and not midi. Reaper is a full fledged daw much like Sonar and Cubase, but is shareware; you can do midi with Reaper.
There is a way to get a good drum kit somewhat free... look for the sfz free soundfont player then download the ns7_kit drum soundfont. All are mentioned and linked in the plugins thread. You might need to read up a little bit on midi and vsts, I suggest heading off to the Tweakheadz Guides that I linked in another thread. Go thru the entire guide... it sure helped me a lot when I was starting out.