Static/Routed IP and NAT

Hi I know the topics a bit conflicting but wondering if you lot can help.

I have a WNR2000v3 on a cable connection PPPoE into an openreach modem. My ISP has given me 8 static IPS so i have 5 usable (one is the routers).

I was wondering if it is possible to have my server on a static external IP, but the rest of the LAN using NAT and be translated to the routers IP.

Is this possible, i dont really want to do port forwarding. If so how do i achieve this.

I also have IPcams I want to be able to assign a static IP to, whilst still not affecting my LAN beening NAted to the routers address.

Any help would be great.

Thanks