I believe so.
Hit F2 at the boot prompt from the CD, It'll give you a list of "cheat codes". I believe therein lies a command, which should be just to type in the location of your boot image... Usually something like
/boot/vmlinuz
in a hdd install from Knoppix. Or you could just download a boot floppy from the net and use that. What's messed up about your MBR ?
-Shade
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