I built a USB version using an MSI motherboard, Model number MS6380
http://www.msicomputer.com/product/deta ... 66_Pro.htm
with an AMD XP 2000+ CPU and 512MB.
I also used a cheap USB memory drive i.e.. A Peak II USB 2.0 Flash Drive 128MB this is their web site.
http://www.peakhardware.com/
The only problem was that I was not able to select it in the BIOS configuration as a boot device. This was overcome by Formating the USB memory key as FAT in Windows XP.
Now I was able to to do the install as descibed in the installation manual.
This is a really nice I am really please with the result.
I hope that this helps, I am sure when people have instant success with this install they never think to supply any feedback to the forum.