Creating a different FTP site on second PC

I am running an FTP server on Win 2003. I need to add a second FTP site on a different PC which will not have a public IP therefore it needs to gateway thru the Win server.

My thoughts on this are to use 2 NICs in the server one being an outside IP and one being a private IP and using network bridge to talk from one NIC to the other. I would then use a crossover cable between the two boxes.

Any comments and help on this issue would be appreciated.

Alvie