I'm no expert by any means, but I managed to connect to remote desktop by using this:
Computer: (use your computers IP address, not your routers)
User: (should be the same as your normal sign in)
Password: (self explanitory)
Domain: (Leave blank)
This worked for me, but I am on the same network as my computer.. I DON'T know how to log in from another wi-fi point.
Izod2010, let me know if this works (on your home network)
If somebody knows how to get remote desktop from an outside Wi-Fi point, please let me (us) know.