Why want my thumnail show up on categories like my old site. Go to www.dsgcentral.com for the old site and go to www.dsgcentral.com/dsg for new im gona move it over the other one when its build.
You can set the layout however you want it on VM2 by editing the view templates or css & using overrides. Image effects are also easier as VM2 already installs the jQuery library.
http://forum.virtuemart.net/index.php?topic=90935.0
http://dev.virtuemart.net/projects/virtuemart/wiki/Hints_for_the_use_of_the_template_system
Do you mean you want to show your category products in one column?