Looking at purchasing a viper alarm and would like to install it myself. Has anyone here done this. Viper says in order to maintain the warranty it must be installed by an authorized dealer/installer. To have this done (at least in my area) it will cost between $550-700. I can by it online for $200 plus $60 for the VATS module required for the T/A. Since That is less than half the cost of having it installed, it seems I could just buy another one if I have trouble with the first one and still come out ahead. Thoughts?