Quote - My "fixed" pose won't work in the WD, when I try to apply it the slider just resets to zero.

How did you create the fixed pose?    You might need to edit the hipHeight, thighLength, and feetDistance back into a library-saved pose, in order to make it Walk Designer compatible.  I'm not sure whether there's anything else about such poses which differentiates them from regular poses.  :unsure:

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.