If you are not yet familiar with the VirtueMart installation procedure, please read this before you start:
http://docs.virtuemart.net/tutorials/30-installation-migration-upgrade-vm-2/80-installation-of-virtuemart-2.html (http://docs.virtuemart.net/tutorials/30-installation-migration-upgrade-vm-2/80-installation-of-virtuemart-2.html)