What's "MSM?" Also it's safe to delete after done to prevent any future issue, right? I'm asking these "silly" questions because I'm working on a proggy to be as "safe" as possible. So what "triggered" the updating of .gcd? How does .rgn gets updated? Is it wise to backup/dump of certain regions before doing an .rgn update? Taking a break from NNG hacking to obtained these knowledge needed for my Garmin update proggy.