Hello! I hope somene here can help me. I purchaced a Viper 160 VX system for my 2001 Dodge Grand Caravan. The problem is this one installer says that I need some sort of amplifier for the power source as well as some relays. The other installer says that I do need the relays but no amplifier. Do any of oyou know exactly what extra parts are required to install a Viper 160xv in a 2001 Dodge Grand Caravan? Thanks (I already know that I do not need the bypass as my car does not have a security chip in the key) Thanks!