CS3 Animation

I'm really sorry if this has been asked >_<

I have got CS3 Beta and I was wondering if it is possible to do animation in it. I've done all the actuall animation part but when I come to optimize it so I can make sure it is a gif and maybe lower the file size, I can't seem to find optomize tool anywhere.

Have I just been wasting my time or can you make actually save animations in CS3?