Okay... You just completely lost me. I went to languages, all I had were search windows. I found the instant_markup.php, but I didn't know what to do with it. I couldn't pull anything up from selecting it. I didn't get anything about ubb. I think I need just a bit more step by step advice as I am new to the back end of forum software. I am relatively familiar with the control panel (although it has changed a bit from the classic).
