Aleksey Telyshev wrote:

Hello,
Any way to add/replace new wires without destroying drywalls ?

Thanks
Aleksey

If it's just a short run, like within one room, consider using surface
mounted wiring stuff. Like these things from Home Cheepo:

http://tinyurl.com/bw8re

HTH,

Jeff

--
Jeffry Wisnia

(W1BSV + Brass Rat '57 EE)

"Truth exists; only falsehood has to be invented."