Question for Jeff:
I know this is an old thread (and still in my archives!), but I'm wondering if this worked for you?
I have a similar situation - I have a laptop that needs to be backed up. I currently have it configured for wired backups, but the user more often uses wifi (DMZ) and then VPN's into the network. If the symlink method works out, I can issue a static IP via the VPN.
Thanks,
-Kris