Are you sure? I use Vuescan under Windows XP and SuSE Linux 8.1, and it supports my flatbed and filmscanner under both OS's.
Direct from the Vuescan "supported scanners" site: --- USB Film Scanners supported: (snip) • HP PhotoSmart S20 (Windows only) ---
I don't know why.
Cheers,
- Dave
http://www.digistar.com/~dmann/