dummy network ... hmm. well, git couldn't see my usb wireless nic, so the way i got around that was:
1) install ms loopback adapter
2) bridge loopback & wireless adapters
3) configure git with the "microsoft mac bridge virtual nic" packet device
link for ms loopback install instructions
to install the bridge, go to your xp help-and-support center, search for 'bridge' and read the 'create a network bridge' topic. you'll want to bridge loopback and your network card.
hope that helps you