"Wind-blown" particles

[Blood Raven]

Hey, I have a quick question about particles.
I made a model which is essentially slow-falling particles. Is there a way to make them tilt to one side as they fall, like they're being blown by wind?
Thanks in advance!

 

[PROXY]

Check out the Chimeare and the dwarven copter portrait models, I think the info you need is hidden somewhere in their particles. I'm not sure exactly but i found it somewhere there (or at the other flight models, might also have been the bat rider for example).