I agree with bluetone, render out a TIF sequence and use that in an editing programme until you are ready to make your MPEG2. Rendering fields will make you animation look much smoother, and any quick movements will not 'strobe' as much. If you happen to be in the UK or most of Europe or Australia then the picture size should be 720x576 and 25 frames a second (50fps if you must do fields) if you are doing a 4x3 shaped frame. Here in the UK, and for most widescreen DVDs the picture ratio is 16x9 which equates to a pixel size of 1024x 576 (Oh God! I can see this is going to get complicated)but then the editing programme should squash it up to 4x3 to make a 16x9 full hight anamorphic picture. If you really must know more then look at www.mill.co.uk/widescreen . Hope this helps, good luck.