Hi,
The reason why people purchase CleanMart, is because they want to keep using their own/premium joomla template purchased from somewhere else (gavickpro.com, yootheme.com, joomlart.com, shape5.com or anywhere else)
CleanMart will add Virtuemart Support to a ordinary Joomla Template.
We have picked "Gantry" template in the DEMO, because it was
free and
responsive, so providing tutorial about how to instal "gantry" is completely pointless. Because you should be using your own/premium joomla template (or in the worst scenario, you would use Gantry because it is free to use)
Actually this is the reason why there is no "QuickStart" package comes with CleanMart. CleanMart should be applied manually.
But if you like our DEMO design, then you can download "Gantry RocketLauncher for Joomla 2.5" from
www.gantry-framework.org/download and apply the "CleanMart" after installing the Gantry Rocket Luncher. Once you add some products/categories to Virtuemart. You will get exactly the same look as our DEMO.
Regards.
Support.