Boot Menu Screwed up, computer won't boot

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http://askubuntu.com – I've been using Ubuntu to for years now, I'm an EE and love the system. This week I was having trouble with Ubuntu so I decided to do a fresh install parallel with Win XP. The install crashed midstream and now I can not boot at all. I believe all I need to do is repair the grub.cfg file, or maybe another file?? So, I booted from my liveCD and went into the file structure and everything seems intact, However, the grub.cfg file looks like it's a mess. I don't remember how to gain access to GRUB via permissions. I did it once before a year ago. any one with any ideas??? (HowTos)