Got a few nissan sentra spec v questions??

Whats yup guy I'll start off with alarm system thats been acting weird?I had some ground wires installed by mechanics near my job.They installed them exactly the way they were suppossed by the battery terminal ...to the chassis etc etc.Unfortunalty, now my alarm is too sensitive in my car.For example, if I don't unlock my car with the remote and open the trunk the alarm will go off.Another example, is if the car keys are in the ignition and turn half way and let the radio play and finally close my door the alarm will go get in to SET mode and beep2 or 3 times and few mins later it will go off.Same thing goes for my dvd player when my car is parked and have the key tunred half way in the ignition.The car will beep constantly as if the alarm was ready to go off and if it goes off I have to press UNLOCK or LOCK to shut it off.I'm gonna take it to a import dealer that sell mufflers,bodykits...etc..etc to check it out.Could anyone tell me maybe they hit a alarm sensor or something......and whats the best suggestion to get the alarm back to the way it way before I installed the ground wires.....Thanks....Also are there any body kits that could possibly fit or get custom for the 2003 spec -v ser.I"m not too crazy about anybody kit except one thats pretty new.I want a look like the mitsubhishi kits or the hondas kits have love their body kits....has that stealth look and what would be a kool oringinal color to paint my car that would totally change my car's look from the normal red......thanks for you helps....peace