I’m only for cpanel aswell , cpanel for me, so install that in first vps movment so they dont charge again , ect
then for upgrade when your promoting https://secure.hostgator.com/addons/vpsupgrade.shtml
then for downgrade after promotion https://secure.hostgator.com/addons/vpsdowngrade.shtml
I thought i would post the actual links because they dont actually have it on there site theres the direct links
that i had to get threw chat
cheers