How to configure NETGEAR FSV318 router? (for 5 external static IPs and 10 internal)

Hi I have a NETGEAR FSV318 router. I have about 10 devices on the internal network (192.168.0.x) and have received 5 Static IPs from my ISP. How do I configure this Netgear device to listen to 5 external IPs and route the traffic to 5 different PCs and still use the remaining devices in my local network?

I have no clue on how to do this. I heard checkpoint might be a better solution since it has static mapping in the router? Anyone knows?

Thanks