|Unless you have a specific need to have 5 computers using routable public IP addresses, I wouldn't bother. |
If you do however have a specific need, then the simplest solution is put a small switch before the router (ie: Internet >> Switch >> Router/Public IP Clients), plug the clients that need to use the public IP's into the switch and configure their TCP/IP settings.
This way, if you still have clients you want to have internet access, but don't require public IP's, they could connect to the router and access the internet through it. If however, you only have the 5 clients you don't need the router in there at all and it would look as follows:
Internet >> Switch >> Public IP Clients
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.