Perhaps, we're hectic here.....
57 views and not 1 response?
In regards to your concern, I think with VPN if you're trying to connect to a Domain (is your network on Domain?) from a non-domain computer, you will not gain access to the Servers or network resources. However, with Terminal Services using RDC from any Windows O/S, I'm 100% sure that it works bec. I use RDC.
Let me do some more research and I'm sure you will get more feedback later on.