alarm swap

Hi guys, I have a clifford G5 770 installed in my car, plus 2 extra sensors, proximity and windows break sensor. I really like this alarm but at the same time I am not happy with it. Reason is because I have talk to a lot of "installers" and no one seems to know how to make the blackjack feature to work in my car, my car is a nissan altima 2008 with push button starter. The installers said that seems my car has push button it is not imposible but dangerous to install the blackjack because it migh cause problems with the car computer.... Blackjack was the reason I got this alarm :( Well, What I would like to do now is swap the alarm for a clifford 2 way alarm, so the question I have is, can I buy the alarm and just swap the unit it self??? Or do i need to remove all tge cables and sensors from the car?? Is possible to only swap the main unit, i mean the brain leaving all the connection and sensors I have now????   I mean plug and play. Reason is because I dont really want to pay more money to get someone to do the swap and I dont want to cut more cables in my car :/.... I am a noob in alarm, :/ that is another why I would like the swap to be plug and play. Thank you guysEnglish is my second lenguage so do not look at my gramar ;)

G5 Cliffords are a whole level of quality better than ANYTHING else on the market except maybe Compustar. Think very carefully about this and get your installers to contact their DEI tech rep about it. Have you actually set up (programmed) the Blackjax and tried it? Swapping from a G5 means a whole new system Siren, etc. (Even the battery back-ups between G5 and other DEI aren't compatible). Personally I've always found Blackjax a PITA, because usually I have a large German Shepherd with me. In other words, a complete removal and refit, no plug and play between G5 and the other Cliffords which are re-branded Vipers and inferior. Nothing wrong with your English, just use a spell-check.