Extract and copy ONE of the paks into End/Content/Paks/~mods.
For the stockings paks, you can also optionally add the tifa_white_panties_for_stocking_mods_p.pak

Versions of the stockings paks which should be compatible with https://www.nexusmods.com/finalfantasy7remake/mods/1267.
The stockings paks must have names which are alphabetically after the purple dress mod (e.g., zzz_...)

Fishnet stockings for TIfa

For stockings mods, you can also optionally add this pak to get white panties, re-packed here (without the skin textures) from this mod from gojeeb: https://www.nexusmods.com/finalfantasy7remake/mods/212