If you want make just pure AS3.0 project, not Flex project, there is problem with Tween. Adobe has not included Tween to pure AS3.0 project, it’s included in Flex framework library (at least I don’t know something). So you have few possibilites how to use Tween in your project. By including Flex framework library, make your own Tween Class, or use any already built framework, packages which has custom Tween class inside.

Let me know, how you are using Tween in your AS3.0 projects, maybe you will help someone.

Here is list of already build Tween classes for you (I will update it, when someone point out new class):

• http://code.google.com/p/tweener/