networking pc's and ps3 isn't that hard - if you have more than 2 pc's connected then you already have everything you need. a router typically has 4 ports (so that means 3 pc's and one ps3 or whatever else) the problem becomes a little trickier if your trying to use wireless but the ps3 has a wizard for this and the worst part is setting up your router with a key (and these days most are already set with one). the manuals for both devices should walk you through it.