Now you can be Dusty Baker!
I know you want to do this. USA Today has a little Flash-based game where you are presented with various game situations and depending on the decisions you make, the Cubs either score or don't score, or give up or don't give up runs against the Giants.
It's not quite accurate as to current rosters -- Todd Walker and Barry Bonds both appear -- but the situations given are realistic.
FWIW, I got the Cubs to win 12-4, making the choices I thought best. Playing again making the exact opposite choices, the Cubs lost 6-2.