But while poking around noticed that from the outside box the telephone cable was connected to Cat 5e!!!! As I poked around each telephone jack in the house I noticed they all had their own individual run of Cat 5e running to them and all the unused strands were wrapped around the Cat 5e tucked in the wall

So in the garage I found an OnQ enclosure installed inside the wall and opening it up found this mess of network wires with ALL the strands apparently wired up already... (see the flickr album below for some cellphone shots of what I speak of)
https://flic.kr/p/vvjepE
So my plan...errr desired outcome... Each room plus the living room (total 5 rooms) will have an Xbox 360 to run TV duties - in each room there is a phone outlet (and I already have wall plates and the necessary snap ins to convert them into rj45 jacks) that will become ethernet outlets. So each room has a home run of cat 5e but they all run into the enclosure in the garage and are connected to errrm that panel inside it. The main HTPC and internet connection will be in a downstairs computer/office room. TV and internet incoming through COAX.
In the crude drawing below (not remotely to scale) is the general setup of the outlets (colored ovals) with the one in the garage (green oval) being the OnQ panel. So right now would I need to do anything to get the all the outlets to work as a proper network (after wiring each RJ45 correctly anyways). Can I just plunk the HTPC and Internet behind a switch in the office/computer room and run an ethernet to the red wall jack that connects the rest of the house ethernet and be good?
Or do I need to do something to the "panel" wiring that is inside the OnQ panel? Like maybe get a patch panel or setup an actual physical powered network switch inside the garage? I want to avoid having to run any powered items in the garage (mostly because it is not an air conditioned space) but if that is the only way to make this function I will do so... I know I can spend the time and/or money to run dedicated cat 6 the way I want, but I am attempting to set this up as simple and quickly as possible for NOW - so that we can get moved in and enjoy the house right away (the wife does not enjoying suffering through downtime just because I am messing with hardware lol)
I think I know the answers or what I need to do but wanted to see everyone elses thoughts that have more experience than I do with this stuff!
Thanks!
PS I am assuming that I will need to purchase a mini patch panel like this one http://www.amazon.com/Legrand-AC1000-Ne ... ywords=onq connect 4 of the rooms through the patch, run patch cables from those 4 to a network switch. The cable from the computer/office room would have to be terminated with an RJ45 cable and then plug that cable into a network switch - leaving all 5 connected into a network switch (or I could go the inelegant route and terminate all 5 cables with RJ45 and plug them all into a 5 port gigabit switch)