Remote control for the VNS
 

I have a 2007 Volvo XC90 and when I bought the car the dealership didn't supply me with a remote for the GPS. There are some remotes available on the internet. But the main question is, do you have to program the remote so it could integrate itself in the system? Finally, are there any other things that I need to know before I buy a remote for my system? Thanks for the replies guys.