It was a real tough call for me. I am somewhat of a carpenter, much more so than electronics guy.
I was mainly concerned about structural support of my plasma (big and heavy).
It was a big job, I took out a big section of sheetrock, re-enforced the wall (backing), ran wires thru walls (hopefully the right wires), replaced sheetrock, hung the 55" plasma.
I hope I ran the right stuff ! It works, but I probably should have run some extra shit, if I really knew what I was doing.
I could add a wire if needed, hopefully via snaking.