In light singles or twins the crosswind technique should be the same regardless of less or more flap. More flap (full flap, that is) gives you the advantage of less float and that is most desirable. Less flap will naturally cause a prolonged float which is precisely what you don't want. Not only does it eat up the landing length from over the fence but it exposes you to more chance of getting a gust and you will have to continually increase aileron and rudder movement as the aircraft slows up in the air while floating until worse case you run out of both controls just before touch down. Also increased chance of wheel-barrowing if you have to force the aircraft on the ground due long float with less flaps.