I have a legend HCx and I downloaded the Garmin bluechart g2 hxus039r us (entire us) and using KenGen 1.5 and ID-411 I still can't get the .img file unlocked. I may be getting my steps wrong. Can someone give me some help. Thank You

Try with GarminUnlockerAlternativev6.02.
I'm not sure work .. if this map like garmin normal map .. maybe work :)