I want to fit a car alrm to my Zafira (1.8 Design 2003). Has any one got any sujestion as to where to mount the siren? (the engine compartment seems quite full!) Also Has anyone got any sujestions on which type of car alarm to buy? I want one that will work off the the original key blip, but so far i have only found one suitable ( Autowatch 375 Clam - supplied by Abacus Car alarms )