fit a toad alarm and a microwave sensor , had 1 set up on my old 90. when it was all set up was awsome if anyone walked within 3 feet of it it would chirp at um twice then would set the alarm off if they did'nt fook off .
you need very understanding neigbours though
I have one of these albeit from adrenalin 4x4 and can't fault it. Have a search on here, this subject has been covered many times and there are a lot of different solutions.