I guess I didn't figure out the loop issue. For my editing program (Pinnacle), I chose to export as an avi file, 720x480 dvd ntsc and 25fs. When I created the warp morph, I could not find the option to loop. The morph goes through one time and stops. If I export as a flash file, I am given the option "looping flash". Problem is I can not get flash to work in my editing program.
Both Flash and Animated GIF file formats support a built-in looping option, but AVI not. So you can only turn on the loop option in your AVI player program to make the play looping.