I've finally upgraded the forum to the latest version. (phpBB 3)
And yes, before you ask, this layout is only temporary!
This is the default one, and I find it horrible too - but it was not possible to convert the old one directly, so I will just take some time in the next few weeks to make a new one. For now, let the presentation for later, and concentrate on functionalities.

This update was necessary, because it adds many new functionalities that we were missing, such as sub-forums. Of course they are not all ready to use, I will need to configure the forum a bit. (for example I will add the sub forums later)

If you encounter any problem, just send me a message.
Enjoy!