SetAreaTransitionBMP

// Set the transition bitmap of a player; this should only be called in area // transition scripts. This action should be run by the person "clicking" the // area transition via AssignCommand. // - nPredefinedAreaTransition: //  -> To use a predefined area transition bitmap, use one of AREA_TRANSITION_* //  -> To use a custom, user-defined area transition bitmap, use //     AREA_TRANSITION_USER_DEFINED and specify the filename in the second //     parameter // - sCustomAreaTransitionBMP: this is the filename of a custom, user-defined //  area transition bitmap void SetAreaTransitionBMP(int nPredefinedAreaTransition, string sCustomAreaTransitionBMP="");