And you are so board that you had nothing to add but just had to reply to a post with absolutely no helpful info, what's wrong with you?? I actually found the answer there is a program that converts it It's called G-Raster. Works great.
Great, glad you found an answer, but no need to be so rude when folks are trying to help, Garmin custom maps have allowed me to do various things in the past. G-Raster by the way is nothing more than a program that works to produce Garmin custom maps.