imgs go in sd/Garmin.
Is sd formatted FAT32 ?
IMG with FID greater than 2200 needs to be unlocked with an unlocker.(gimgunlock)
.unl is not enough, you'd need .gma file too.
Routable maps covering the same area cant be selected at the same time in the same profile in 62. Just one will show. In 62 topo maps in recreational profile cover CN map.
You cant load 2 CNA, different or same version, at the same time.
Do you get any error starting 62?