Product inquiry/Ask a question modules facilitates your customers with the ability to ask question about your product and helps you improve customer relations.
http://addons.prestashop.com/en/contact-forms-surveys/20966-product-inquiry.html
2. Installation
This module requires PrestaShop 1.5 or newer version.
To upload Module:
1. Go to Back office >> Modules >> Click upload module and select ZIP module file to upload.
2. After uploading module you can find it under “Front office features Tab”.
3. Click install button and you are done.
4. Links to view/reply inquiries should be created on Main menu >> Catalog.