So I will need a router then? Because i got an ethernet cable for my PS3 Slim but it won't fit in to the other socket on my modem. I'd have to take out that cable that's already in it and plug the spare ethernet in the socket but i wont my computer internet. Any good routers you know that is cheap but great to use?

I keep getting this error when i'm trying to PM someone and sometimes when i reply in a forum. How can I stop this error from happening?