No special measures necessary, follow the standard installation process – extract the module folder into the /modules directory. Install the module through Admin -> Modules -> Install Modules (see below). Detailed instructions on installing modules are available in the XOOPS Operations Manual.
Extract folder 'wggallery' in your module directory
Log in as admin and goto admin area
Install the module through Admin -> Modules -> Install Modules
configure the module
the next steps are setting the rights under System --> Groups.
To uninstall the module, just click on the red arrow