Actually, if you are wanting to copy the usergroup permissions, and not the forums permission, the one i use for that on setting up a new usergroup is here:
https://vborg.vbsupport.ru/showthrea...hlight=inherit
The one hellsatan references also ROCKS, but if you are using this to create a new usergroup and want to inherit settings from an existing one, the other is actually easier to use....i have been using it for a while now, and on 2.2.8, all is still working fine.