It's an OS 9 IP running AppleShare IP. Some of the drives on it have shortcuts created to them on the Windows machine already, and connecting is possible. I installed a new drive on the Mac, and it's being shared via Appleshare IP. However, I need to create a new shortcut, or share point, to it on the Windows machine, but I can't figure out how to do that and I can't even find any info about it online.
But obviously it has been done before on this very machine, so it's possible.