When I try to save a new project and try to use "Video for Windows (*.avi), the only option I have is for a 720x480 frame size. Is there anyway to change that in Movie Studio HP Platinum 10.0 ?
As musicvid says, you probably mean Render As > Save as type (*.avi) Templates. Click the down arrow in that box to see options. Choose an option and press Custom... to see which one can be customized as you wish.