use 2 templates

[domifry]

Hello

i have my website with a template. Now we integrated a webshop and planned to style it. now we have a template for a complete webshop. is it possible to use only the style elements for the payment process ? If i said to VM use this template it overwrites my old template fully
So to change my template to a theme

[jenkinhill]

When you say "payment process" I assume you mean the checkout page(s). Make a Joomla menu link to VirtueMart Shopping Cart  and assign your template to that menu item only.