windows overwrote my mbr
I've been running ubuntu warty warthog for a while now and reinstlled windows because I had to have counterstrike. Anyway, doze overwrote my mbr and now I can't boot back into ubuntu. How can I reinstall grub from a knoppix live cd? I've tried mounting my ubuntu partition and doing a chroot to it and running grub-install, running grub manual and doing root (hd0,2) setup hd0, as well as just about everything else I could think of. none of the posts i've found on linuxquestions have been any help.
when I run grub and try to fix it the way various posts say to, I get this
Error 21: Selected disk does not exist
*note* my linux distro is on the 3rd partition of my first disk