Back on topic...

The ideal solution would (of course?) be that the empeg player has both an ethernet "emulation" and a storage device "emulation", that way, it could be mounted as a "harddisk" on quite a lot of OS platforms.

Wouldn't this require writing two win drivers. To have the camera appear as two different devices windoze loads two sets of drivers and they appear in teh system properties as such. Although it would be cool, it's a bit out of the scope of this project.
Having a set of drivers loaded on the empeg itself would be great. plug the player in and it gets recognised as a riocar audio player, USB ethernet device and an external hard disk. Where are the drivers for the hard disk device stored? On the player itself which is accessed in the setup process through the TCP/IP address which was loaded earlier!

Now that's the Da Pantsshizzlenit!