About win2k not regognizing these extra controler cards... i was able to install win2k by providing my ultra66 driver disk as an additional scsi driver when you begin the install. i think that screen might only appear if youère doing a fresh install, on an upgrade it might not ask and you might lose your hard drive 1/2 way trough the install and fail till you reformat.
if someone needs more help with this, feel free to ask me specific questions, i can awnser them, i remember though, it's a pain in the but to install win2k on an unsuported controler card.