How do you audible from normal kick to onside kick in madden 12 for ps3?

To audible from a normal kick to an onside kick in Madden 12 for PS3, first select your kickoff formation. Then, before the kick, press the L1 button to bring up the audible menu. Use the right stick to navigate to the "Onside Kick" option and select it. Finally, execute the kick as usual to perform the onside kick.