If exporting non-weighted mesh:
1. Make sure the object tree is:
 hair_group -> hair_mesh_group -> mesh

If exporting as weighted mesh:
1. Follow the same tree as all other weighted dress type.(TRS_group)
2. Make sure that your head_joint02 weight group is correctly named.(if you imported a .bs it may have been renamed to wig_head02, etc)
3. add the CollaTKane command
 -es "Setting/Extra_Scene/hairJoint01.txt" 0
 to add hair_group, hair_mesh_group and hair_joint01 to your scene. (or you can do it manually)
4. Go edit your /scenes and replace all "TNode.Parent...;" line of your mesh "TTransform" by "TNode.Parent TTransform :local_hair_mesh_group;"
5. Replace all "TJoint :local_head_joint02" of your mesh "TSkinPolygonGeometry.Joint" array by "TJoint :local_hair_joint01"

If using internal layer(image layer data writed directly into the scene/):
1.Use Extra file acHair without the word Layer.
2. add the CollaTKane command
 -es "Setting/Extra_Scene/hairGroupLayer.txt" 1
3. Replace all "Texture.FileObject FileObject :local_..._FILEOBJECT;" line of your texture2d by
Texture.FileObject FileObject :local_..._hairlayer_FILEOBJECT;
Texture.ImageLayer GroupLayer :local_hair_GroupLayer;
 
 //incomplete...