Well, the good news is, you can do this from VBA code. The bad news is, if the product is already distributed and installed, it is already too late.
Look in the Help files for the registry topics, which will lead you to routines with names like GetSettings, SaveSetting, GetAllSettings, DeleteSetting. These are the functions and procedures you call to do the job from VBA.
You might also be able to do something using RunCommand to activate a Menu Bar option.
Beyond that, I'm not sure what else you could do. Except maybe distribute the files over your network and send out instructions based on the user manually using the Tools>>Active X dialog box to register the controls you want. If your users are not the administrators of their own systems, however, this might not work. But then, in that case Access running under their accounts wouldn't be able to do it either.