Installing Opencart 1.x modules
Usually, opencart 1.x modules are being distributed as a zip archive with the upload directory inside. This folder contains all the files of the module.
Unzip the archive and upload content of the uload dir into root dir of your site using an ftp-client or other file manager.
If the module contains a vqmod modification, you should place it into the folder vqmod/xml/. Of cource, the vQmod should be installed.
Go to System -> Users -> User Groups in admin area and set up permissions to group of administrators and/or other groups.
Go to Extensions -> Modules in admin area to install and set up the module.