Question : Mulitpule Static IPS with one router - RV042

Hi I have just been given a range of IP static addresses from my ISP, what I want to do is basically have two webservers on the same DSL line.
At the momnet I just have one server so using port forwarding to foward the relevant ports onto the server. What I want to do is use two of my static IP addresses and be able to forward one address to one server via port 80 and the other address also forward via port 80 but to a different server.
I am currently using a linksys RV042 which I believe it is possiable to do with but im just not sure how.
I have read a bit about using one-to-one nat but I dont no if this is what I need to use?
Thanks

Answer : Mulitpule Static IPS with one router - RV042

Could you expand on that at all please. I have open port 25 for example twice onthe port forwarding one to point to 192.168.1.5 and the other to point to 192.168.1.6 but it still does not work.
Thanks