This is how my installer atm. looks like
index page: http://i.imgur.com/ag9KZLd.png
If the forum is already installed: http://i.imgur.com/5ijn2nM.png
(every page will then return to the installer index page which shows the already installed message)
read me if file exists: http://i.imgur.com/As8T9yK.png
read me if file not exists: http://i.imgur.com/7igXrfo.png
5 second redirect rule: http://i.imgur.com/JZAWZgW.png
Configuration: http://i.imgur.com/xCEdrq9.png
Configuration false db info: http://i.imgur.com/qKWyueg.png
Configuration not filled in: http://i.imgur.com/NULYLix.png
Installing a table success: http://i.imgur.com/15B2djK.png
Installing a table failed: http://i.imgur.com/3CoTNvm.png
successfully added the tables and default/main data: http://i.imgur.com/s1sbz2F.png