its really not that hard to install it yourself.... i've done plenty.....the deck is easy cuz all the wires are color coded with the harness wires....(most of time at least) and if there not....read the writing on the wires. The Amp is just plugging RCA's and a remote wire into the back of the deck and running it to the amp....then running a power wire from the battery to the amp....then a ground wire from any metal part on your car to the amp. then running the speaker wires from the amp to the subs.....takes an hour or two at most.
My 91 protege took about 1.5 hours and that has the oldest wire setup so if its a newer protege it will be way easier.