See http://forum.virtuemart.net/index.php?topic=79799.msg263721#msg263721
This topic has been moved to VirtueMart Dev/Coding Central (http://forum.virtuemart.net/index.php?board=64).
http://forum.virtuemart.net/index.php?topic=80032.0 (http://forum.virtuemart.net/index.php?topic=80032.0)