PIC House Alarm

My house was hit by lightning and my DSC alarm system is broken, I want to
replace this with PIC alarm system, has anyone done such a design ?
I need about 8 Zones with 2 entry points a horn, 2 keypads and a panic
button , also a output for a radio controlled transmitter.

this will form part of a home automation project at the end so any ideas on
a control bus will help as well ? Is X10 a good idea ?

Thanks
Len


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