I'll try to make this short.
I bought a new PC last week and already had to re-install windows, etc, etc. because of a damaged video driver.
I forgot about using "Restore" (I've never used this feature before).
I formatted my C:\ drive and installed windows xp sp3, motherboard drivers, and the .NET stuff up to version 3.5 sp1
I was ready to install the NDIS driver for my SL-C3100 by using the Sharp CD-ROM
When I plugged my Zaurus in to USB, it just worked!
When I used the windows tray icon to safely remove it, the dialog box had a description of my Zaurus.
Sharp Zaurus SL-C3100 USB Device