The original skeleton model is in fact in global_chr.wld (along with a bunch of other models). There was a nice model viewer that used to be up at
http://www.geocities.com/kaiyodouk/ but the link seems to be broken now. :x The Luclin skeleton model appears in global6_chr.wld. I'm not sure about globalske_chr2 since I can't open it in EQInside or EQ Model Viewer, but I'd bet that's probably the most recent skeleton.
Has anyone written a utility to edit the meshes in .wld files? It would be nice if you could copy and paste the skeleton model from global_chr into globalske_shr... :)