I would like a detailed but easy to understand instructions on how to add a shoutbox/chat onto my SMF forums.
Or how to add a chatango thing on it.
also, how can you add custom bbcodes?
Welcome to SMF.
Did you take a look at the mod section yet? A quick search brought up these results (http://custom.simplemachines.org/mods/index.php?action=search;basic_search=chat). See which one you like and install it to your forum.
You will need to edit the /Sources/Subs.php file to add your own BB codes.