remote starter install

I just bought a crimestopper cool start remote starter w/alarm and keyless entry for my 1990 buick lesabre. How difficult will this be to install and does anyone have a wiring diagram/experience with this car? I am comfortable with doing electrical work and do not want to pay someone to do what i can do on my own. I already have the tach signal wire run into the area where the control unit for the starter will be(I put an aftermarket tach on the car about a year ago) but do not know where to look for the correct ignition wires. any help will be much appreciated thanks!!!!!!!

on that car u have to drop the panel under the dash and you will be able to see the ing block and the associated wires. take at least 2 of the hot 12ga wires