You could buy the inactivity timer for $3 that is worth for a year from the user control panel on these forums, if you don't think you can login in 31 days
try to check that you have no redirects setup, and all your scripts are set to the correct domain, as some scripts might redirect you to the old domain (like wordpress and phpBB etc)
You have to install it manually, the softaculous team might have removed it for some reason, maybe for the fact that the phpBB support team doesn't give support for pre-installs if you would need help in the future
There is only one version of PHP at the moment.
register_globals should never be used, as it increases the risk of your site and the server to be hacked. Also, it is deprecated as of php 5.3, and removed as for php 6