I have made an animation that is 640 X 480 with Square Pixels.

I was told that I have to give the animation to a video guy, but that it has to be 720 X 480.

Do I simply have to change it to the .9 setting and change the settings to 720 X 480? Because when I tried that, it looked stretched on my computer screen. It looks correct at 640 X 480 with square pixels.

Thanks.