Retrofit Homelink
 

Has anyone retrofitted the Homelink Garage opener? What is invloved?

I'm talking about in the C5 which had the Homelink in the sunvisor? The newer models seem to have a transmitter behind the bumper and somesort of module in the dome.

I found this article. I hope it is as simple as this:

http://www.audiworld.com/tech/elec19.shtml

What is the advantage of upgrading the homelink already in your car?

Actually the car didn't come with homelink and hence I wanted to retrofit it. From the article it seems that the homelink system is completely integrated into the sunvisor, so it should work.