Well, I can't get my hands on a Mandrake CD right now (actually, I have a copy of Mandrake move, but I highly doubt it contains the installation and rescue routines), but you gave me a good idea - I checked and my Red Hat disk does, in fact, have a rescue system on it!
It wound up doing the trick, at least as far as letting me get into my system. After that, I ran grub-install to put install back onto the drive how it's supposed to be (into the MBR). However, it didn't work right; the screen comes up all wrong, and the boot options don't work.
I think that, with a little tweaking, I could get it to work right.
But it's easier to just reinstall Linux right now, since I hadn't done too much in the way of customization.
I wish I could do two harddrives, but the way my case is (mind you, that's the only problem, the case...well, and maybe the power supply...but that could be fixed by a simple molex splitter) it can only hold 3 3.5in devices...so I've got my Hard drive (a 120 gig one), floppy drive, and internal USB hub (man, I love that thing!) taking up all the spaces....and I've seen some horrors caused by hard drives not properly in the case (ever seen a magnatized hard drive? they're fun to play with, but don't boot well...lol)... I actually have a spare 15gig hard drive (and a half-gig...), but i'm wary to just leave it lying around in there, not in a proper spot...
At any rate, I just might be able to fix it if it happens again...with a little patience.
PS: if anyone has other suggestions, feel free to post them. I'd be willing to be this will happen to me again; at any rate, it's bound to happen to someone else.