I would contact DEI personally...at least they wont try to sell you something you might not need afterall you know <img src="/forums/images/graemlins/wink.gif" alt="" /> I believe you can add a module, but you would have to find out from them, I know some of them aren't compatible with remote start. remote start with responder is way too cool <img src="/forums/images/graemlins/smile.gif" alt="" />