ah, you want this to work in applications, too, then forget it (except i am missing a keyboard->mouse option)
however, this is not what you want to do here, but if you need that for a certain application only, you can relatively easy hack into most app´s menus and add new keyboard commands of your choice using a resource editor.
i do that for quite a few specific functions in the apps i work with, cause even when you have a mouse, it is sometimes more convenient to use a command. in some cases i am using the same commands for almost 25 years now, and wouldnt even remember that it once was implemented by me.