Manually copy movies to ATV and play using default player?

Long shot, but is it possible to manually add movies to the ATV (w/ ATV Flash installed), into the default ATV library, so the default movie player can access them (i.e., not using Saphire or other third-party players)? Just looking for a way to get additional movies onto the device when I don’t have access to iTunes to copy them over?
k.