Let's start with what I've got set up now. Don't remember the model of modem I have, but I know it's DOCSiS 3.0 and I have the router part disabled. Wireless devices are in the pink box. The right half of the picture is in my room (starting at the switch) at the back of the house, the left part is in the front of the house. I could probably google this a bit but I'm friggin tired and lazy right now.
So here's where the question comes in. One of the PS3's and my phone are used in the back of the house. The wireless signal is flaky at best back here, lucky to keep one bar on my phone, if anything. I was wondering what I would need to get a good signal back here. I assume I need another piece of hardware (router)?