Hi all
Think a bad case of RTFM:D
I misread the manual.
You can run "Bog standard" RDP in administrator mode
On the local (client) computer run mstsc.exe /admin.
This connects in administrator mode which doesn't consume a CAL license.
You can have up to 2 concurrent "Administrator mode" connections.
Your user needs to be in the "administrators" group on the W2008 server.
The manual isn't very clear over this stuff and I'm still wondering if one can use the WEB RDP in adminstrator mode as well - but that's another topic.
Cheers
jimbo.