Hard drive went bad, the size and model of the new hard drive is different, but that's it. Here's what I have on backup tape:
Exchange logs and database
I do not have the files from the C Drive.
I've installed SBS 2003 on the new drive and have it up and running. I tried to update to the correct service pack and restore the system state, but it just caused a reboot loop, so I formatted and am trying again.