As always, a pic to show quickly the issue:
Well, since we don't need the Portal feature of Icy, we renamed forum.php to index.php and change something more in constants.php (if I don't remember bad). So now, it works, but some issue appears when we click on the forum category showed in the navigator/locator, and the problem is that (although SEO is on and points to an html address), the real address used by the navigator is "forum.php?cat=tatatata", so I'm wondering if there is a way to change that and force it to use index.php
Thanks in advance for your time!