I would recommend rendering to 720x540 to correct for the difference between square pixels, and rectangular pixels. Make a few different versions of the timeline in Premiere. Then show the different clips to a trusted friend, preferably someone NOT in the business. Get their HONEST opinions on timing, sequence and any added audio. (You ARE adding some music/sound FX to your pieces... right? And ORIGINAL, yes? People who spend their days doing intellectual property work are sensitive about others copyrights.) And, when/if it works... let me know. I could use a job in the animation field too. :>