Hi, you can attach new polys to the original mesh, but it goes like this: Original mesh: Delete BSDismemberSkin modifier New Mesh: Edit & Convert to editable mesh (you can edit it as an editable poly, but after that you have to convert it to an editable mesh. Make a backup copy of the poly, if you want to edit further). Original mesh: Klick on the Editable Mesh (modifier) and attach the new mesh. Add a new BSDismemberSkin modifier, open it, click on its subpart and select all faces of the mesh by dragging a box around it. If you want to texture it, please take note of this: http://forums.nexusmods.com/index.php?/topic/562202-tutorial-editing-the-horse-mesh/page__view__findpost__p__4560810 Best regards, Gary