OK I added

define('PORTAL_CONFIG_TABLE', $table_prefix . 'portal_config');

In constants, I can now access the Install folder. But there's only the Install button, when I click it I can now click the Proceed to next step, and then get this error:
SQL ERROR [ mysqli ]

Duplicate entry '4-118' for ...

Prior to running the installation script, you need to upload the edited files, especially /includes/constants.php.

Thank you very much! And sorry for being a douche and talking like one, I was just nervous my forum was screwed up.

Your Portal Version: 1.0.0RC3
Your phpBB Type: Standard phpBB3
MODs installed: No
Your knowledge: Beginner
Boardlink: http://xstudios.org

What have you done before the problem was there?


What have you already tryed to solve the problem?


Description and Message
How can I uninstall ...

Your Portal Version: 1.0.4
Your phpBB Type: Premodded phpBB
MODs installed: Yes
Your knowledge: Basic Knowledge
Boardlink: http://www.xstudios.org/

What have you done before the problem was there?
...Aaahh... Nothing?

What have you already tryed to solve the problem?
Using the god ...