I ordered my remote starter today. Viper 160XV for $90 off ebay. The only thing is that I need the bypass module to make it work. Here's my dilemma: do I have to have a DEI module like this, or can I get this universal module? If possible, I'd like to get the universal because it's cheaper, but I want to make sure that it will work with the Viper system. Anybody know?