Glad you managed to figure it out. :) I wrote that reply after my shift at work, didn't get home until 11pm! Anyway, as far as fitting it to David, you have two options that I can think of - manually refitting it with an external program (e.g. Blender), or using magnets. Magnets might be more versatile if you're planning on using expression morphs.

Unless someone who knows poser better can suggest something else?