fair enough
i'm not sure how to do it in photoshop - i can barely do it in paint.net and i'm sure i don't do it the best way (i add the shots as two layers, then rub out the bits i don't want - sure there's a more sophisticated way of doing it in photoshop...).
i have the joys of learning p'shop soon, as i've just ordered elements...i expect to be very frustrated for a good while!