Hi, I submitted a proof of concept patch for this a week or so back that added a simple file->exit menu to the builtin Internet Explorer. I've spoken with Jacek a bit about it and it seems shdocvw.dll is the correct place to implement the UI layout if we are targeting IE versions less the 7. There seems to be a plugin interface the GUI uses for browser extensions but if a first pass I don't think we really need to support it. Unfortuntly due to time constraints I am not going to be able to work on this project so if there is anyone out there that wants to contribute with a simple fun project, please feel free to add menus, dialogs and the address bar. I'll try to help as best I can but I expect to be tied up for some time to come.
Thanks Steven