In PAGE_CONTAINER, css files are loaded. I'm using Luke Foreman's Kotomi add-on to then embed a third-party program within XenForo. However, the css file is loaded by directly calling .css, which using Kotomi means that it's looking for the css page within the current folder. I addressed that by adding a Template Modification that references the boardUrl and thus pretty much "hard-code" it to grab the right file. Now I'm having a minor issue where the non-default XenForo CSS is not properly loaded, and I'm hoping that I can somehow pull the same trick for that. I sidestepped the issue for now by hard-coding the call to the css I can see in the page's source, but obviously this is far from optimal (adding a new add-on would mean the line would have to be fixed again). In PAGE_CONTAINER, the following line appears: Code: <!--XenForo_Require:CSS--> I assume that is a hook for adding all the additional CSS files from add-ons. Is there any way I could somehow have the board url automatically put in front of the css.php file reference there?