Help Guys

Alright, heres the deal I have 6 to 8 people and we want to play a 4v4 starcraft game. I have 1 wired dlink 4 port router, and a linksys 4 port router, when we did port 1 to port 1 we could all see the games, but not join unless on the same router as the host. I also tried wan to port 1 and wan to wan. Any suggestions, the internets have not been helpful thus far. can i use a big 8+ port switch or do i need a router. Sam I forgot a lot of networking stuff. Thanks Guys.