Well I'm new to Linux and Knoppix, so after trawling these forums for an answer, as I had the same problem as you, I found a post with a little scribble at the bottom, which completely solved the problem!! Don't ask me how it works as I dont completely understand what it does, but it works! It's only 3 commands too!

From the terminal (after booting from knoppix live disk):

su <enter>

mount -o dev /dev/hda2 /mnt/hda2; chroot /mnt/hda1 <enter>

lilo -v <enter>


Viola - Your mbr back and everything!!


I'll post this in one of the help sections just incase there are any newbs like us that cant get a quick fix to when we have to reinstall windoze ever 5mins and it eats the mbr.

Mors