Proportal and hide to guests plugin?
But I DID get it to work on portal. I added the "hidden content" tag to the cookie posts (bottom of page 1 on leefish portal). If you are NOT a guest you can read it, if you are a guest it is completely hidden on portal. Is that an option?
Is that ok?
But in theory it is possible. It is the same way you set up the pro_portal to work - you rename portal to index and change a couple of things. The good news is, you can try this without uninstalling proportal.
Make a copy of the current portal php and then replace that with the portal php from the MYBB download. Now you are using default portal, but all your pro_portal files remain.
Then you need to edit the portal php to be your homepage.