if you read the Topic you should know what I want to do. I've seen on an old phpbb2 Board, that the Boards Categorys where replaced thru custom Images. Could I do this also for the actual Version of phpbb3?
I am sure that was an old trick of putting the link of an image directly into where you would normally put the forums name. This is not available in phpBB3 but there is a new feature that allows you to have a forum image for each forum if you want to. You can find this feature where to create/edit your forum in the ACP. Though you may need to edit your template to get the desired effect you are seeking.