Am trying to help my sister-in-law with getting Linux on an HP Vectra VL/133 (Pentium 133 Mhz with 64 Megs of RAM, 2 Gig HD, 1 Meg video card) that I added a DVD-ROM/CD drive to.

I can boot a Windows CD and a Disk Partition CD using the DVD/CD drive, but can't seem to boot either Knoppix, DSL, or SystemRescueCD. These CDs work ok on my newer machine at home, so I think they're ok. Is there some magic that folks on this forum are aware of that might explain this behavior? Is there some type of floppy bootloader I should be looking at? Other suggestions?

Thanks,
Ewan