Hello Bhogsett,
Thanks for the question about HHVM support! When I researched this issue, it appears that you would need to have at least a VPSor Dedicated server account as there are some requirements that you will need to have Root access with the server.
At this time we have no How-to guides on this software. Apologies that we can't provide direct assistance with that issue.
Regards,
Arnel C.