I've always used the script in the Pose Room, myself, but I don't think it should matter whether you're in Pose or Hair.  Just as long as all of the tools you need to define groups and change the camera view are present.

I don't seem to be able to duplicate that error, which is troubling.  Can you tell me what you did when you got the 'bool' error?

Proper workflow?  (I'm going to try out bullet points now.  Please pardon.  :lol:)

• Create one or more groups on the skullcap or other prop from which the hair will be grown, using the Grouping Tool.
• Start the script.  Your groups should be listed in the "Select group" listbox.
• Upon selecting a group, guide hairs should be automatically created, if they did not already exist.
• Click "Add marker" to create the first hair marker.  This will be the base of the hair path.
• Add a second hair marker.
• Click "Show path" to display the preview path for the hair curve.
• Position markers to create the desired path shape, adding more if necessary.
• Adjust script settings as desired.
• Click "Run Script" to position the guide hairs for the selected group.

And, dang.  I notice that my capitalization is inconsistent on the GUI.  Hmm. 

The various settings... should probably be explained, too.  I'd have to play around with the script a bit to refresh my memory of the specifics.  :lol:

I can't seem to generate any errors, on this end, though.  The 'bool' error you reported looks like there's a bug in the script somewhere.  The latter error is a puzzle to me.    Has the script been able to give you any status updates in the status box?

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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.