Thanks! I too have struggle much too long with having to insert a CD anytime I wanted to use my maps.
In my case it was roads and recreation.
As per Neo Geo's advice I uninstalled mapsource, copied the roads and rec file to my hard disk, then reinstalled mapsource from the hard drive files. It was then a simple matter of downloading the latest version of mapsource off the garmin website and I was back in business.
Pretty easy even for me--a non computer person.