Nathan,
Actually this is what I want to do:
I have my smeserver at 6x.xxx.xx.1 and a webserver at 6x.xxx.xx.3
I want to bring the webserver inside to the internal lan and give it a 192.x ip. I then need to add 6x.xxx.xx.3 to the smeserver so all web traffic goes through that box and I can forward the port (80) traffic to the internal server.
Kevin