I found a method for showing all 5 cards face up then vanishing the chosen card fairly without having to cop anything or whatever. The thing is, it uses a gimmicked card, which I then have to carry on me all the time I want to perform the trick. In addition to that the point where you remove the 5 cards becomes a little more complicated. And really, it's only good for making magicians do a double take, to a layman it makes no difference, so I've stopped performing this now since the alternative is just as good and easier.
As for making the card appear elsewhere, I don't really see the point, since face up in the middle of the deck they are holding is not only the easiest solution, but also one of the most impossible locations as far as the spectators are concerned.
Tom