If it was THAT simple it would have been announced and included in the deal at the time of the trade.
I am getting my information directly from the Rocky Mountain News, not making it up. And its NOT that simple, because when the deal was made in the pre-season the consensus was both Denver and Washington had good teams, so any swapping of picks would have been minimal ie swapping the 18 pick and the 21 pick, or something of that nature.
It is only because Washington was so much worse than expected that the trade looks as lopsided as it does. Obviously the Skins would never have done the deal, knowing what they know now.