If you worried about changing the speakers or taking trim apart and running wires etc then get it done professionally, I can do most wiring jobs but its the taking trim off I refuse to do so I prefer to hand over to someone who will pay if he c***s it up!! Speak to a couple of local dealers,also ask them installation only costs as many items are far cheaper on the net,
I paid about £90odd to keep my steering wheel remote as the kenwood interface is infrared, kinda pointless, links to steering wheel remote, goes to a box =under the dash then to infra red led on steering column then beams commands to the head unit!!!
Is worth it tho just to stop u messing around with remotes