First off, get yourself a copy of The Ultimate Boot CD then attach your drive as the master on your primary IDE and disconnect your other drive. See if you can boot from the HDD itself, if you can grab your files, RAR them up and stash them on an FTP, otherwise boot the UBCD and run the diagnostics program which matches the drives manufacturer and see what the condition the drive is in, depending on that you may have to get more in depth and use some data recovery tools.