How to put Nose ring cc in game?

Hi. You should always start by cloning a similar item and studying it.
Clone any nose piercing and you'll see that it is affected by b__CAS_L_Nostril__ or b__CAS_R_Nostril__, it is uv unwrapped in uv_1 because it needs to morph and it is vertex painted with 007F00
- expand the rig, toggle the eye icon next to "head" and "head_2" to find out which is the head and which is the mouth cavity. Sometimes they have different names depending on the frame and the category of the item;
- make the real head selectable (cursor icon);
- transfer uv_1 from the real head;
- assign the whole mesh to the right bone;
- vertex paint