Crewe-

A guy at work has been using his Mac to load his empeg player using JEmpeg, a nice little java app. like Emplode. Here's what he said to do.

The only thing that you need to do is:
1) Find a PC, load up the Emplode software and connect to your empeg through the USB port (not the ethernet).
2) Start Emplode and go into options and specify a specific address, something like 10.0.1.185.

Once you have configured the player to a specific IP address, you can use JEmpeg with your Mac and skip Virtual PC completely by connecting your empeg to your Mac using the cross-over cable you mentioned earlier.

I know that this takes you in a different direction, but I hope this helps...