help with keyless install

hey guys, im going to install one of those "hands free" keyless entry systems, but I've only ever worked on stereos before...
anyone know where the central door locking connections are? This is the best quesion to start with, but i have many others. If anyone has ever installed keyless before maybe they could refer to me to a step by step guide or drop their email adress here.
much appreciated

Slim what unit do you have? model and brand? What is the year make and model of your ride. I can help you out. My email is [email protected]

oops! can't beleive that I didn't include that info, lol. I threw you an email with the info. Thanks for offering to help!

No problem. Just research this product before buying it. I havent installed that brand yet. It wont be a problem though. They are all pretty much the same. Check the waranty and rep.