[GordonF]

Looks like Adaptec's installer doesn't actually check to see if the hardware was FUNCTIONING before proceeding with the install.

I wonder if that works with NT...

Here's something else I discovered, and you can thank Intervideo for doing this in the demo version of WinDVD:

Download the installer for WinDVD 2000 demo, but DON'T install it, then open the self-installer with WinZIP or WinRAR to find ASPIINST.EXE and extract it. The WinDVD installer runs this as part of the installation, but nothing says you can't run it yourself. This should install v4.60 of ASPI on Win9x and NT/Win2K.

It seems WinDVD needs ASPI to talk to ATAPI and SCSI DVD drives, and that installer doesn't look for Adaptec hardware either. In a worst case you can install WinDVD and uninstall it to install ASPI.