Hello Peter

1. I downloaded install/index.php
2. I added the two lines
3. I upped it again
4. If I try to open /forum/install/index.php I get redirected to /forum

You deinstalled the forum before you did this? The install script looks for the existence of the settings table in the database (forum/install/index.php, line 59 and following) to decide if the forum is already installed or not. If it is, you will be redirected to forum/ (like noticed).

Ich hoffe, du hattest schöne Festtage...!

Als Atheist ist das für mich nicht so spannend, aber die Hoffnung gilt natürlich auch allen anderen.

Tschö, Auge