Thanks for replying guys!
Actually the Freeze Transformations was employed already and they did change the rotation though. (as It can be seen in the model I posted in the November Competition Thread) However as people who have downloaded the model can note, I forgot to actually check all the legs, and there still some legs doing the bad rotation.
However I didn´t know the procedure Mike just showed us. So thanks again for replying guys. I might even get there and fix the d*mn legs once and for all.
I would like to know though: What the hell does this Freeze Transformations procedure actually do? I mean, what does it freeze*? Is there any particular reason why it should be done? What cases should it be used in? I mean .. I don´t understand the thing.

*Now since I know there´s some sarcastic dudes like me around here, please remember: I do know it freezes transformation, but in what way? :p