Thanks for that. I'm trying to keep it as simple as possible. The added complication is that in my scene, the TV is actually moving. I agree that compositing in After Effects or Premiere Pro seems the simpler option. ie export each scene from Maya as images (because I'm rendering with mental ray), import that into Premiere Pro CS3 to create an AVI file. Output the flash as an AVI file. Import the Maya AVI scene and the Flash AVI into Premiere and composite there. It's a while since I've used it but I remember being able to resize the video (like a picture in picture) and then match the motion to the 2nd layer. If that makes sense? Am I on the right lines here? Is After Effects CS3 any easier that Premiere Pro CS3 for compositing?

Thanks again