Korn,
Excellent advice and an illustrative way of showing that parlays aren't the evil thing that for whatever reason most make them out to be. All they are is just 2 separate bets with the risk amount of the second bet an unknown factor at the time of the bet (either zero or the payout amount from the first bet)
However, it's possible that rich is asking this in order to get a jump on the 2nd days lines before they move, in which case waiting until he gets a payout from the first game won't work very well for him.
BTW, Olympic also has the next days games up very early and will let you parlay them.