Get some 12 gage wire, that has a thick plastic shielding on it, to protect the cable, some states/cities require fire safe cable if you are going to have it in the wall, but if your doing it, then its your call..
There is really on 2 or 3 things you need to do the job right,
1) snake
2) drywall knife
3) speaker distribution connector
you can go to homedepot to get the snake, it will be in the eletrical area, it is basicly a wire that winds around a cylinder, and at the end has a attachment with a hole at the end, you use this to tie the cable to the wire. You should get a buddy or wife to help you, one of you being in the atic with the snake, you might need to cut a hole in a cross beam depending on the location in your atic. And then push the snake down the wall to where you want the cables to come up from. Then attack the cable to the snake, and pull it up the wall. Run it across the atic to where you want it, then push it down.. you should get a speaker wire distribution plate, so you can have the wires attach to that and then go into the wall nice and neatly. You should do this about this time of year, sense it will take you a couple of hours, for me to run 4 cables it took me about 4 hours in my parents living room.this should not be a project to be scard of, just take your time, and don’t force anything.. one thing to note, is if you are going to be running cables on any exterior walls, depending on the construction of your house, there will be more insulation in those walls and pose a bit more resistance…
one more thing, when you are in the atic, get your self, a ¼” piece of plywood to lye down on, so you will not be lyeing directly on the drywall that is your cealing.
