Animated textures?

Hey…
Okay I have the UVanimation scrript but how do you make an animated UV tex that supports alpha? I know that you need to use targa for alpha…

Can you tell me if i’m on the right track?
I’m using a camera and a spot lamp above my character and the material is set to env, so all that is amimated is the shadow, now how do i turn that into a animated texture

Thanks
Chuck