With Kurt Warner, you either have to put a lot of pressure on him via the rush or disrupt his receivers and timing patterns. If you can't do any of those, it's going to be a very long day and Kurt Warner will have a field day!
The only other option you have is to hang on to the ball and kill time. The 49er's seem to think that they can run the ball effectively and if so, it will eat up a lot of time.
But if it becomes a Run, Run, Pass situation ... it's gonna get UGLY!