so i wanted to combine Foggier's chinese peasant hat nif with the great khan helmet. I arranged the things and then tried equiping it on the test dummy in the geck. When the test dummy wears the hat, only the great khan helmet portion shows up.
here's the link to the nif.
steps i've taken after extracting and downloading the desire models:
1. opened 2 windows in nifskope, one for the chinese peasant hat and one for the great khan helmet.
2. copied the chinese peasant hat branch and pasted it into the great khan helmet window.
3. repositioned and rotated the newlypasted chinese peasant hat to fit the great khan helmet.
4. saved the nif and imported it into blender.
5. cleaned up the pieces of the helmet (the horns) that overlapped with the chinese peasant hat
6. selected everything in blender before exporting it.
7. opened the newly exported nif, chinese peasant hat parts are missing, great khan helmet remains
8. reopened nif from step 4 in a separate window, deleted the unmodified great khan helmet and replace it with the edit great khan helmet mesh.
9. changed the branch name of the chinese peasant hat to "chinese hat parts" and changed it's nodes to object 2:1 and 2:2 (the hat's edge was separated for some reason)
10. added material property tag to the chinese peasant hat branch.
11. saved nif, placed it in FNV meshes data folder.
12. opened geck, edited armorcombathelmet form so the model would be 11th's nif. opened up testing dummy npc, equiped testing dummy npc with edited armorcombathelmet.
13. saw the problem with the model, despaired.
(Edit: 1 month and 100 views later, still no reply. I am sadden.)