JB folder games do not require .rap license files (as they are ripped from physical discs). However, if the game requires installation data, you may need to manually move the "Game Data Utility" to match the JB folder to avoid duplication.
Even with "extra quality" downloads, you may encounter issues: ps3 jb folder games download extra quality
Unlike ISO files (which go into dev_hdd0/PS3ISO ), JB folders require specific paths: JB folder games do not require