heh, you took the bait huh?
hmm, not sure why you should be getting that error at all, assuming that booting to the CD still does give you that "grub>" prompt and nothing else, does entering "boot" not do anything, what about "gentoo"?
Is this an old machine? you might be getting this because you don't have a framebuffer capable graphics card on your system.
Try loading on a different system, it's not going to automatically touch anything on the system, it's perfectly safe.
ohh... you've fixed it in another thread haven't you?
thanks for telling us here....