can i add some html code to my phpbb forum source code ?

[markaw]

please can someone tell me if its possible to add some advert html code to my phpbb forum source code, if so how do i go about adding the code to which ever place i want it to be.

[bonelifer]

You should ask general support questions on the main forum: http://www.phpbb.com/community/ As such I'm locking this.