Q: Can I have different frame sizes used for the still shots versus the animations?

Answer: Yes. There is an option (your site administrator controls) that allows you specify the X,Y dimensions of the static image, and what is used for the animations. This is useful because creating animations for 640x480 images takes some time and creates very large video files. However, creating an animation using 320x240 resolution is quite acceptable and performs quite well, both from a computation standpoint and download time.