Well, maybe someone is watching over me. At least I knew enough to be able to edit the boot.ini file and change the drive number. So, at least the system is back up and running without having to do a complete reinstall.
I'm still a little pissed that I lost 12 GB of information and downloaded files, though.
And I may still have some problems, because I don't remember if I installed any programs on that drive, that Windows won't be able to find now.