[AS3]mx.effects.Tween ... gone!?

Ok, I’ve looked all over the internet for a solution to this, and I’m certainly not skilled enough to re-write the class…so can someone please help me.

Is it possible to use mx.effects.Tween in actionscript 3? If not, are there any alternatives?

I found this http://www.ericfeminella.com/blog/2006/09/04/as3-custom-tween-api/

but I don’t know how to use a *.swc file.