Sorry to necropost.
I must point out that cdburnerxp made my drive disappear, and I had to uninstall it and follow direction on the windows 7 site to make my drive come back.
For those of you who have installed cdburnerxp on Windows 7 and had no trouble, consider yourselves lucky. From what I read, this is a problem with some burning software out there. I had to uninstall it and delete some registry entries.