Sephiro: I think if you poke around, you can find some descirption of what you need to do, but here's the short version. YOu can ask on, say, #xbins-help if you can't figure out individual steps.
Get a tool to extract files from the image HDDdriver made of your hard drive. You need your whole C: drive.
Get Xboxhdm and extract.
Put the crap from hdddriver in the "C" folder under the xboxhdm install, and make a CD image with the included instructions. Burn.
Boot to xboxhdm, hot-swapping your hard drive at the boot prompt.
Run the "xbrowser" command, and restore your C drive from the contents of the cd.
If that doesn't get you up and running, I don't know what will.