Modify vApp properties with VI Perl

Hello,

I have some VMs I'm using as templates, with custom OVF properties, like shown below :

On this VM there is a script run at boot time that retrieves these properties and configure some stuff in the VM.

This way, to instanciate my template, I can clone the VM, change the properties, and restart the new VM. This is working fine.

I can run this entire process with ovftool , from a linux host.

However, I would like to change my current process, and do it using VI Perl api.
I can clone the VM, but I'm stuck at modifying these vapp properties. I'm able to display them but not update.

Does some one have any pointer on this topic?

Thanks!

chris