well, i had the same trouble... and was able to fix it all by following the instructions here:
Re:Did you SCREW your Grub? Now stuck in Grub Rescue? - Linux.com: Linux Forums | Linux.com
just make sure you pick the right partition.
cheers.
10v, N80, 1 Gig ram, 160 Gig HD, A06 /Windows XP

/ SL 10.6.6

NBI 0.8.4 Special/ Linux Mint

|
Please use my Dropbox Invite link:
http://db.tt/4z2wwup