I recently had a very similar problem with a machine that had previously been working. It turned out to be a bad hard drive. Each time the PC would reboot from the setup, the main board would fail to detect the hard drive. Yet when it booted from the CD it was there for the Installer to find and format. Just about drove me crazy until I realized it just wasn't being detected, and then it was and then it wasn't and so on. Just coincidence that it could be seen when the installer got to it. I think I would try to get my hands on a floppy drive and plug it into the board temporaily and copy the cd to the hard drive. Then start the install from there. Nice that we don't need those useless floppies anymore eh? Thanks Dell, thanks Gateway.