I find Cyberlink's PowerDVD rather shaky, be it versions 2.5, 2.55 or 3.0, in Windows 2k. It easily conflicts with sound cards, aspi drivers and SP1 plus a number of bugs about regional code, hardware acceleration and DMA. The best way to be sure to have it work is to reinstall Windows 2000 with just minimum drivers and install PowerDVD first and then learn what devices and programs create conflicts.
The following steps should help:
A) Go to Inmatrix, get Drive Region Info 1.1 and check if Tohiba DVD is region locked:
http://www.inmatrix.com/B) Go to the Firmware page to get Firmware update for Toshiba:
http://perso.club-internet.fr/farzeno/firmware/C) Apply firmware update to make the Toshiba DVD RPC-1, check with Drive Region Info 1.1
D) Go to Inmatrix, get DVDGenie 3.85 install and configure region selection and PowerDVD controls since it will control DVD playback.
E) Run regedit and since the Toshiba DVD is now RPC-1 find the very first key under line [HKEY_LOCAL_MACHINE/Software/Microsoft]. It will be anything bizarre like {#"ll or m;-k. Just remove it after exporting for safety.
F) Install PowerDVD and restart.
G) Run DVDGenie and push the Run tab to start PowerDVD and after configuration (some choices are possible only at the beginning, other during play and other after a stop).
WinDVD 2.3 available at Intervideo Website is much more robust and always works well in Windows 2000 with DVDGenie and all Nvidia adapters with a powerful CPU. Matrox cards works best with Cinemaster. The choice of DVD sofware remains closely linked with the kind of graphic adapter and optimization provided by the software.