Hi David,
Yes, you can change our module contents in Prestashop admin panel.
Backoffice >> Localization >> Translation >> Installed modules.
you can use your same email templates for customer email.
If you need any further support or module integration in your site. You can purchase the installation pack, we will give you the 6 months free support and module upgrade.
http://www.modulebazaar.com/en/services.html?mode=grid
Regards,