I'm trying to pose a soccer player I've created.

How do I mirror image the pose?
E.g. The guy shoots with his right leg. In the mirror pose, he shoots with his left.

I tried Duplicate with -1 for the X Scale factor, but the shirt will also mirror image because of that.

I'm thinking of using 2 sets of skeleton, one with the controls managed by Set Driven Keys. But is that possible?