Preloader and Transition for Dynamic Files?

hi,
i have question. @ this tutorial: www.kirupa.com/developer/mx/preloader_transition.htm is movie i like to use but… (there is allways but :)) instead looping movie loading… i would like 2 use percentage 2 show proggres of how much movie is loaded. so my question is: can it be done? if so, in which way?

thnx.

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