Behaviors in AS3

hello,

I have been messing around with flash for a while and I recently upgraded to Flash CS3. I recently learned that Flash CS3 does not support behaviors. Does this mean that I have to hand code everything? Is there a CS3 version of behaviors?

One of the greatest aspects of adobe software is backwards complatability. If this means that I have to tough it out with AS2, I have no qualms with that.