i would try to see if knoppix can access your data first (http://www.knoppix.com/
). download their CD image and burn it. boot with the CD. use knoppix to copy your files to another storage device. if this doesn't work use a winME boot disk (bootdisk.com) with DOS on it. enter FDISK /MBR at the prompt to fix your master boot record.
as a last resort slave your hard disk and use another hard disk which has a running operating system on it. do not install any software or OS on the corrupted disk to prevent overwriting the data. use a data recovery software like ontrack easy recovery to get back your data.