Managing PhatBox from OS X with Virtual PC

I've found that PMM works well under VPC. With the USB 2.0 cradles, I can have VPC take over the USB drive via the USB settings. With the USB 1.1 cradles, you need to share the drive with VPC, as found my J Alex:
you mount them under OSX, then turn on "share network/removeable drives" in the VPC settings. The drives then appear under "network drives" in XP and Music Manager recognises them as the DMS!.
You can use the same technique to make your iTunes MP3s visible to Windows.