Thread:Semantic-mediawiki.org:Community portal/Semantic Bundle

Could someone point me to the best place to ask for help w.r.t Semantic Bundle, and how to change LocalSettings.php ? I have tried as documentation says, but it doesnt work. Using the dir SemanticBundle doesnt work either. Are there different instructions for what to put in LocalSettings.php if you have downloaded from Git? I'm using Mediawiki 1.21