Odd Problem Trying to install 10.0 Community Edition

Used Bittorrent to DL the 10.0 community edition which produces 3 iso CDs. Have also Dl'd directly the 10.0 rc2 for AMD Athlon 64s.

In both cases, when I go to install, I get to the point where it asks if you want to manually partition, and I tell it to go ahead and auto-partition my boot drive.

It then appears to start trying to format hda, and then dies with some error about being unable to do so.

This was not a problem the last time I tried 9.2 (same machine), and was able to install Fedora Core (issues with firewire and my Linksys WUSB 11), and Linspire (fewer issues with the firewire and the Linksys works fine) onto this same machine using a similar strategy.

Any ideas?

Thanks,
Ewan