you can catch most commands in a plugin, and change what it does.
I think that includes load and menu commands
I have done that with RRACCess control, which at the moment just blocks all commands and saves them to end once a successful keycode is entered.
But to then fool another plugin, well it depends on whether it actually checks to see if it is on the correct skin.
Some functions in my plugins do need to check this, others don't.
What plugins and screens are you having a problem with?