How to run different shops from one zen-cart install ?
Simply by installing the Multi-Site Module !
/!\ WARNING /!\: This is a Beta release; I have only tested it on 1.3.7 shop freshly installed. You might encounter problems if you install it on a "modified" zen-cart, or a previous version of Zen-cart. Also, you might encounter some problem of compatibility with other modules.
This is why I advice you to use that on a test store first and give me some feedback of any problem you will encounter; so I can fix them and update the release.
Any advice about anything relating to this release is the Welcome !