For those trying any of this using Windows RDP... here are a couple more notes:
- I found issues using "run as", so I found cmd.exe in Explorer and did a "run as" with that to get to a cmd window with the right permissions.
- the sound drivers for uplink require the RDP session to leave the sound at the remote end.
And one other 'feature' I couldn't get working properly was DTMF through the skype-skype-sip session