Backup Exec 2012 and V-ray option

Hi guys, 

 

I have a standard installation of backupexec 2012,  i have  now buy  v-ray license for backup virtual machine of vmware infrastructure. I need , on my installation, enable only the v.-ray code ? Or i need reinstall backup exec? 

 

I need remove my agent on the virtual machines? or is possible use v-ray and same time the agent standard for backup? 

 

Thanks 

Fabio