Boomerang is not the most recommended alarm. Not australian standards, get something with all black wires.
Give me a call on 9723 8388 and i'll get a deal for you, i use the Autowatch on my car, the same one george is using.
Autowatch- all black wires, 3 point immobiliser, shock and microwave sensor, meets australian standards, hidden button all just starting points. Been selling and installing these for bout 3 years now and not one return all happy customers.
Other option is Quik Trak, can organise.
Best of luck.