That's what you get for leaving programmers in charge. Back to 710.

It looks like it only works with Windows (not NT) and Mac OS 9

"It connects to any host computer running Windows 98 SE, Millennium Edition, or 2000. Alternatively, you can integrate it into a Macintosh OS 9-based network, but the changer doesn't yet work with Mac OS X."

There is some information at: http://pcworld.about.com/news/Jan192001id38742.htm

The Powerfile relies on MediaFinder software to access the discs inside the changer. If you can figure out what commands MediaFinder sends to access the discs you would have a start on the solution.