What xlarge is hinting at is that given it's not a rockbox function, it's not a subject for discussion in the rockbox forums....
Of course, I'm asking so I can get the movie back onto my RockBox player, until I found out that I can't put anything very large on it yet. So I'm not sure how it wouldn't be allowed...
Musicmad: Thanks a lot, I'll give it a try

massiveH: Yeah, I found that, but none of their "free software" was free, or it just did not work.