It does work kind of, but it's not perfect, and it's also quite unsecure when you bare in mind that the portals installer and uninstaller are included in the same file. I would advise against you using it untill it is complete.
Odd.. on my portal I just get some random MySQL errors..
It needs to be installed... on your portal page replace the filename in the URL with:
portal.php?install=roger and that
should install it
Well I dont need it anymore! We got RC3