Heres a flash image of it.
http://homepage.mac.com/rplate/Sites/walkback.swf
AND
Here's the Anime Studio file.
http://homepage.mac.com/rplate/Sites/walkback.zip
Remember it's a point animation, so the extra points at the bottom just off the main screen are part of the animation. That's where I hide parts that aren't in a particular frame. ie, the shade on the soles of the shoes and the finger lines or whatever need to be hidden. That way I don't need switches etc.
Also I had to split the pant legs in two because one leg goes behind the other at various times. While the hands go behind the body I hide them in the outline of the body. So if the dots look like a mess in places it's a purposeful mess. The figure was set up in Poser and then saved as a two tone movie, then rotoscoped.
If any think rotoscoping in AS is easy they haven't taken the challenge yet. It's a craft in and of it's self.

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Thought I'd add the frontwalk here as well.
http://homepage.mac.com/rplate/Sites/frontWalk.swf
AND
http://homepage.mac.com/rplate/Sites/frontwalk.zip