I read on some newsgroups that it was possible to flash the 9100 with the 9300 firmware using Sonys flashtool with HP's firmware.
I could not resist to try it out

and after some nailbiting, booting win2k and testburning I can tell you it worked *great* !
All apps and windows see the drive as a 9300+.
So far I have burnt 5CD's at 10X, no problems at all.
Tested with Nero5, EZCD5 and CDR-Win.
If any of you want the files I'll send them to you, just mail me...
// Toby