You install VMware on your CentOS linux environment, then can install VMware tools. Virtual SmartZone is an Application, that you can load under VMware. We support the vSZ, but you need Admin skills for your OS and VM platforms.
thank for your reply ! My virtual Smart Zone is already installed on my VMware ESXi. I have to install VMware tools on the virtual machine now. as i did not find any documentation about VMware tools for the virtual Smart Zone i thought it has to be installed in the OVA (which is CentOS based).