@xxshark
1. As the small CX will not work with CNNTUnicode you must use the full CX.
2. Unlockers do NOT work on CX, either small or full.
3. Use JM to generate unlock code, selecting 'Custom Mapset' in 'Select Map Product'. Use FID 800 only (don't enable additional fields).
4. Put the CX.img and CX.unl (any convenient name but must be same name for both img & unl file) in a folder named Map in root of sd, not in Garmin folder.