It used to be a good brand of alarm...I haven't been involved in car electronics installations for about 12 years now though. One bit of advice is to hide the wires. Use existing looms if you can and put the siren in a very out of the way place.
The best system I had (have) is to gut the cigarette lighter, put a oush button switch in the lighter base and space it so when you replace the lighter it just touches the switch. Connect the switch to a relay and interrupt the starter wire. press the button and voila, no starter. The switch is very hidden also. You can interrupt the fuel pump power but it is very dangerous to do this. If the relay fails, no more fuel and that could happen while driving.
FYI