If you want 1-3 items from Wedding Dance, which I think has loads of new items, it's going to be incredibly complicated. First you need to find the items in item_kinds1.txt, paste it over to native's item_kinds1.txt, change the number at the top and save, then find the meshes of the items, then take the .brfs and .dds of those meshes and put them in Native's Resource & Textures folder, then edit Native's module.ini, and add load_mod_resource "insert resource .brf name here*