I finally took the plunge and downloaded Mandriva 10.something (the free edition). I then burnt the image onto a bootable DVD. When I put the DVD in my drive, if Windows is running, it goes crazy until I eject the DVD.
If I boot from it I get into a program called DR-DOS, which seems to have all the regular DOS commands. I can see from it that the disk has the right stuff on it, although I can't tell if it has everything it should. I can also tell that the disk is bootable, as I don't get DR-DOS when I insert a non-bootable disk.
My question basically is, how do I install the OS from this DVD. An issue may be that BIOS (and DR-DOS) think the DVD drive is a CD drive. BIOS shows its size as 700MB and DR-DOS tries to load MSC100 (or something like that), which, if I remember correctly, is Windows' driver for CD drives. However, as I said, nothing seems to be missing from the DVD.
Help would be greatly appreciated. I have lots of experience with both Windows and DOS, but none at all with Linux. (In fact that's what I'm trying to get.)