Group Manager is a simple module to manage XOOPS Groups. It allows you to easily add or remove users from groups. It also allows you to set which group can change each others users, through XOOPS permissions.
No special measures necessary, follow the standard installation process – extract the module folder into the ../modules directory. Install the module through Admin -> System Module -> Modules.
Detailed instructions on installing modules are available in the XOOPS Operations Manual
Currently there is no tutorial