boomerbimmer,
What kind of garage door opener do you have? I used to be a garage door/operator technician and I often ran into people that wanted to code their Genie door openers to the Home-Link systems in their cars. If you have a Genie, you'll need to install an extra box to make it Homelink compatible. That is, unless you shelled out big bucks for the super expensive Genie opener.
Other models like Liftmaster, Sears, Chamberlain, Wayne-Dalton...etc... you shouldn't have any problems.