I know this is a long shot but i am trying to set up a cisco soho 97 router with a block off WAN IP addresses to LAN IP addresses

I have 4 servers to connect up I Domain Controller, VPN, exchange, and ISA.

I have the router set up with one static IP Address, the network is kind of working but i need to use the rest of the WAN addresses to map to the LAN addresses.

Anyone got any idea of this?

thx