Hi I upgraded my VM 2.0.8a to 2.6.6 layout of cart is crumbled
Please help on how to handle this.
You probably need to edit/rewrite some template overrides.
SO I goto www/template/<mytemplatename>/com_virtuemart or com_vm_pre_order or mod_virtuemart_cart
Right which one is most probable
Not possible to know without knowing how your template is set up or seeing the site.
just disable the whole override folder com_virtuemart. Check the new layout first, often you dont need the overrides anylonger.