Keyless Ignition System Remote Car Starter, Keyless Entry, Security System, Difficult Or Not So Bad?

Remote car starter, keyless entry, security system, difficult or not so bad? - keyless ignition system

I thought it a starter Bulldog Security Deluxe Remote Car, keyless entry, security system package for my 2003 Ford Crown Victoria P71 (Police Interceptor). I sell Police Interceptors for the public and for us to have confidence with less imperfect Credit Fund, the engine switches to install GPS in their cars (just for the record that the consumer) know about it. My point is that I need to change several of these GPS installed and asked me if I already have a basic knowledge of electronics and know how bad son ignition on my car, how it would be difficult for me to install this system in my car? A step-by-step DVD and manual, and wiring diagrams for my car on their website. I've heard from some people to an installation in 2 hours, other days, or even be finished, even with the tutorial.