Not a bad idea.
If two menus ask for the positon 5, then the first one will get it the way mIRC currently look for script files order, next one would just get the next available position.
However, consider the case where you have two menus, the first one asking for position 1 but has 3 items, and the second menu asks for position 2, should the second menu items be added at position 2, *breaking* in half the previous menu? Should it generate an error?
