NAT before VPN problems

[robertarton]

OK, here is the setup. Our main office and branch office are geographically seperated. We have a persistent VPN connection between the 2 offices which works fine, but if everything worked fine then why am I posting right? The problem is that the main office does NOT have routing setup properly nor will it get setup. This means computers on either office network can't comunicate with each other, making the VPN relatively useless. While pondering the problem I had the idea of using NAT. The VPN client (Win 2K Server) at the branch office can ping every computer in the main office as it is assigned an IP address on their LAN. Can I somehow setup NAT on the branch office VPN client to make it look like all traffic to the main office has come from the branch VPN client? From my limited understanding of NAT this could work. I found a NAT section in the 'Routing and Remote Access' tool but couldn't figure out how to make this do what I want. It seamed more like it was for using to set up NAT internet access rather than translating traffic over a VPN connection

Technical details:
Both VPN server and client run Win 2K Server
VPN uses PPTP

Thanks for any help.