[cybergas]

Guess I am not being probably clear here, sorry for being so annoy.

My original question is covered, 'how to make supermods to add/delete users'
I was able to do that by the settings on the above permissions you quoted to YES for only 2 particular users that are supermods. Just the 'Can Administer Users' settings to yes for 2 supermods only. That's all that gives them access to ACP users only.

These are the settings for them users:

YES for the 'Can Administer Users'
NO option for 'Can Administer User Permissions'
NO for everything else.
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All that said, there's still a flaw (for my board) regarding USERGROUPS.

They cannot see the Usergroups Tab on the Left side of their limited ACP access, BUT if they do a search for specific user or click on the Edit Profile link of a given user, then when they see the full user edited profile settings, they are able to see AND MODIFY particular user's usergroups. Add, change usergroup, etc.

I just have founded minutes ago that this is a mayor flaw even having them users set to 'undeletable/unalterable users' on the config.php

They can easy create another user and grant admin permissions to a new created user, this way they will be able to see the hidden admins/owners forum they should not seen.

I would like them NOT to have access to modify USERGROUPS over the USER EDIT (user.php?do=edit&u=example123) module.
I guess I will have to dig on the config.php or wherever that is (if somebody can point) so they are not able to SAVE changes of usergroups over the edit user profile module.

Got me know?