Found this on sony support page.
Think it will work if you can understand it m8.
Credit to the op Ray186:
Re: How do I hook up 2 PS3's on the same router and not time out???
Options
01-03-2011 05:15 PM
Assign both PS3's a different static ip. Instructions here:
Setting a static IP address on the Playstation 3 - PortForward.com
Then go to this page click the skip ad tab in the upper right corner and scroll down and find your router:
Setting a static IP address on the Playstation 3 - PortForward.com
LOOKS LIKE HE POSTED SAME LINK
Then open the following ports:
TCP: 80
443
5223
10070-10080
UDP: 3478
3479
3658
10070
Then on the other PS3 put it into your routers DMZ:
How to: Get flawless online gaming with your PS3 | Adam Cook