How can i remove 'Categories' or another sidebox header and the placeholder ? I know that the topic is being addressed on this forum in many places but it seems to me that answers are very fragmented and not complete (for less experienced like myself...) If you could post a complete instruction, based on removing i.e. a Banner Sidebox Header along with its placeholder I think it would be very helpful to many of us... I have spent few hours reading existing posts on this topic and trying stuff but must give up and ask for detailed help (which files need to be changed, changed how and where)

This is a cry for help.