Add button to Joomla Editor Interface

I need someone to show/explain me how can I put another button in the Joomla editor, next to the “Insert Image?? and “Insert Page Break?? buttons. See the picture on how it’s suppose to look: [login to view URL] I’ve copied the button files from the mosimage button, and renamed the files to the button I want to create, but I don’t know where Joomla registers the buttons that show on the editor interface, to make the new button show. So, the thing I’m trying to do is just to add another button, so that, when i click on it, it inserts my custom text in the editor instead the "{mosimage}" or the "{mospagebreak}" text that other two buttons insert. I know how to do the above mentioned, I just need someone who could locate the file/place where I can do modifications that will include one more button in the editor. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Joomla 1.013