need more info on writing 'drupal plugins'

I currently have a tinymce plugin that works reasonable well. It is very close to the tinyMCE example plugin, wherein it pops up a dialog, accepts input from the user, and then inserts the input (with special formatting) into the editor window.

That works fine. I even made a module http://drupal.org/project/wysiwyg_syntaxhl that wraps it up and uses the hook_wysiwyg_plugin() function. All is good.

Now however, I wanted to do something more advanced and I wanted to change the user's input on both an attach and detach of the editor. So when the content is loaded, a conversion happens, and when it is saved, a conversion happens. This is actually exactly what the break plugin does, so I studied that code. However, that uses the 'drupal plugin' abstraction layer, so I'm confused as to how to integrate my existing plugin to use the 'attach and 'detach' function.

I suppose I have two approaches:

One) go the Drupal plugin route.

Is it ok to do that even if my plugin is only really for tinymce? If I do, do I still use hook_wysiwyg_plugin()? Or do I use hook_wysiwyg_include_directory() and hookwy_include_plugin()?

If I take this approach and write the plugin following the break.js example, where do I put code to popup a window for user input? In my existing plugin, it is like this:

		init : function(ed, url) {
			// Register the command so that it can be invoked by using tinyMCE.activeEditor.execCommand('mceExample');
			ed.addCommand('mceSyntaxHL', function() {
				ed.windowManager.open({
					file : url + '/dialog.htm',
					width : 450 + parseInt(ed.getLang('syntaxhl.delta_width', 0)),
					height : 400 + parseInt(ed.getLang('syntaxhl.delta_height', 0)),
					inline : 1
				}, {
					plugin_url : url // Plugin absolute URL
				});
			});

two) go the tinymce plugin route.
If I do this, I just need to know what the tinymce equivalents are of the drupal plugin 'attach' and 'detach' functions. Can you give me a clue here?