hi,
In the Live demo of CleanMart, we have used "Gantry Joomla Template" (simply because it is responsive), you can get that template for free through:
gantry-framework.org/download
1- Through the above URL, download this: "Gantry RocketLauncher for Joomla 2.5" and install it to your server.
(Gantry template have 2 preset style: Dark and Light. in our demo, we picked "Light")
2- Install Virtuemart 2.6.8 component (get the file from virtuemart.net)
3- Install Virtuemart 2.6.8 AIO component (get the file from virtuemart.net)
4- Install CleanMart
You will get exactly the same look of our CleanMart demo page.
(but you can get an another Joomla Template if you would like, this is the advantage of CleanMart, there are millions of free/premium joomla template available on the web, simply pick one and let the CleanMart styles the Virtuemart related pages -- which is what joomla templates don't do.)
Regards,
Support