I think you should do something like this:
http://www.apexcone.com/JimPowellHom...RadarLove.html

check out this page to see the locations of the sensors:
http://www.valentine1.com/home.asp

I've never heard of anyone taking them apart but it shouldn't be an issue because passport sells the remote sensor dectors(they're like 1000-1500).

Let me know if you want some help could be a fun project...