You need to have an automatic. They aren't too hard to install. On a scale of 1-10 with a basic car stereo being a 3, I'd say a remote start is in the 6-7 range; just more wires to hook up with one that goes through the fire wall for the hood lockout switch. I'd suggest finding a company that has on line manuals and/or addendum's specifically for the protege that you can down load and read. Then if you feel confident, go for it. I've had 4 and installed two and none that I know of had a special harness as you tapped into the existing system. The more options you get, the more involved the install gets. A factory alarm can cause issues. One car had a dealer installed alarm which actually helped as it tapped into many of the same wires I needed to find (door locks, horn, ground, constant power, etc)