Well, I just got a little more info from the owners. They thought they had a virus so one of them (doesnt know a thing about computer workings, but thinks he has a Masters in Computer Science) started messing around with it. Eventually the mouse was uninstalled somehow and he couldnt figure out what was wrong, as he was making it alot worse.
So basically I am working with a computer with no mouse and isnt wanting to boot. However, I do have a boot disk. I have started the computer with it in the drive and I am currently at the screen with the A:\> and a blinking cursor... what now?