ovftool - Defining the 'Product', 'Version' and 'Vendor'?

Hi,

Am trying to export an ova from a VM using ovftool.  Something along the lines of...

ovftool --prop:Version=100 --privateKey=./id_rsa.pem --eula@=./eula.txt vi://root:mypass@myserver.mydomain.com/myVM ./myOVA.ova

Everything looks good except that I haven't been able to define the 'Product', 'Version' and 'Vendor'  that appears in the initial dialog when customers deploy the template into a running ESX / vCenter instance.

Assume this must be a v common question but have not found how this might be done from the ovftool user guide (http://www.vmware.com/support/developer/ovf/ovf301/ovftool-301-userguide.pdf) or the VMware communities.  Closest I've found is http://communities.vmware.com/thread/328504 which indicates that defining a vCenter vApp allow configurable properties to be set.

Is there any way to define these parameters via ovftool?  If not, is there a way to hack the .ova manually to define them?

Thanks in advance,

Frank.