Attached Link: http://www.renderosity.com/freestuff.ez?Form.Contrib=HaiGan&Topsectionid=0

Walk Designer needs a 30-frame sequence, and you may need to re-apply the 30-frame sequence for each 30-frame segment of your animation. I've got a cat walk for Walk Designer up in my Freestuff which includes full instructions on how to get it to work. If it's not the exact sort you want then it should be relatively easy to re-time your own sequence and use that instead following the same instructions.

I was intending to convert my cat running animation sequence for Walk designer as well at some stage. If you'd like that Designer-ised I can move it up the 'to do' list. (The link's down just at this moment- I'm finding out why right now. In the meantime, I could email you the file if you like.)