if you have cpanel on a virtuozzo node vps you really want to disable plesk install .
This cannot be done for selected VPSes, only for node-wide. In order to remove ‘Install Plesk’ link from the customer’s Parallels Power Panel, it is required to modify /vz/private/1/root/etc/vzcp/pp/menu.xml (on the node) file or /etc/vzcp/pp/menu.xml (in Service VPS).

There [...]