How to install Prestashop module
Install Prestashop module manually using ftp
If your module is in archive, you must first extract it by using programs like winace, winzip, winrar, 7zip or others.
If you don’t have a FTP program, we recommend total commander, filezilla or other.
All Prestashop modules must be in modules directory: prestashop root folder/modules/.
The module must have its own directory and have the root file with the same name as directory: prestashop root folder/modules/blmodules/blmodules.php, make sure that extension is PHP.
Module is properly uploaded
Incorrectly sent to the server module
Install Prestashop module using admin panel
First you need to login into your Prestashop admin panel. Then go to the module tab. Click on the link “Add a module from my computer” and from “Module file” box click “Browse” button. Next step is to select module *.zip file from your computer.
Now you need to complete this process by pressing “Upload this module” button. Page will reload and you should see the new module in a list of your modules.
Module verification
If you’ve uploaded module successfully, you should see the module into Prestashop’s back office – “Modules” page.
Template Installer
You are guided step by step through the installation process to integrate your theme, its variants, and its modules into your boutique.
This module also allows you to have several themes on hand, all configured and ready to be implemented.
http://addons.prestashop.com/en/modules-prestashop/1713-template-installer.html