Setting up 2 routers?

[Buffa M]

So I live in a house with 5 other people and numerous devices that can really slow down my internet connection. It is especially frustrating when I try to play ps3 games with my friends and it's lagging or it takes hours to update a game. I was considering buying another wireless router to use exclusively for my ps3. Would that solve the problem of having slow connection while playing? Or would it have no effect since the second router would be feeding off of the same internet connection. I also am not really sure how I would go about setting up the second router.. Networking is not my forte and I would appreciate any guidance.