Car Alarms: adding shock or proximity sensor to OEM alarm, 2008 corvette ls3, proximity sensor

Question
i just bought a 2008 Corvette LS3, and I got my son a 2009 Mitsu Lancer (not EVO). Both our cars come with a very sophisticated Immobilizer, keyless entry, keyless engine start, Factory alarm. However, both do NOT have a shock sensor. My corvette has targa Top, so I wanted a Proximity sensor. My son's car, as well as Mine came with navigation, and premier Sound system with sub-woofer. I know the immobilizer will protect my car from theft, but what about our goodies such as rims, & music.  I want to know how do I got about keeping my stock alarm, and beefing it up with a Shock sensor and/or Proximity sensor on both cars. Thanx, Bruce

Answer
Well, there are ways to properly do this,
but it's a long conversation since
both cars are unique in what they do and may
have some limitations and advantages for each.

Best thing to do is to call my offices in the morning
to go over the variables. 813 963-3012 9 to 9 daily.
(EST).

Have a good evening.

ROBERT MARTIN-ALARTMEK
CARALARMz.com