[FONT="]In past versions, gameplans weren't actually working, and all they did was to "freeze" your Starting XI, meaning there will be no substitutions to your lineup.
[/FONT]
[FONT="]Unless I'm mistaken, the skin's add-on simply "copies" the FMC/FMT instructions, including the Game Plan options, but those are not part of FM proper, so they're there, but as "empty shells".
[/FONT]
[FONT="]To which degree the AssMan takes over, I'm not sure.
[/FONT]
[FONT="]Some skins also have SImulate Game, so I guess that's the more "invasive" choice, while IR simply gives the result as if you played the game with no further instructions[/FONT]