Help, Random Leaf Blowing-- See Attachment

[addamtron]

i am pulling my hair out trying to figure this out:

i got my leaf to move on a sine wave and have the alpha fade out when it's x position reaches a certain point.

i got the leaf to duplicate as well, but..

what else i want to happen is this:

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when leaf _x position=(say 350)
duplicate leaf
randomize leaf starting x position
randomize leaf starting y position
randomize the sine wave length
randomize the sine wave height
randomize leaf speed
end

basically i want to get the effect of leaves blowing off a tree, while having each leaf be different than the other.

i have attached my quick and dirty prototype, any help would be appriciated, this is driving me nutts