BACK UP YOUR FILES BEFORE REPLACING - I recommend using https://www.gta5-mods.com/tools/emfsp-easy-mod-folder-for-sp-player-mods to modify clothes and accessories easily
For a basic install without using EMFsinglplayer then copy the "uppr" and "lowr" clothes files to:
mods/x64v.rpf/models/cdimages/streamedpeds_players.rpf/player_one (folder)

For the dreads you'll need the mod from here: https://www.gta5-mods.com/player/dreads-pack-for-frank#description_tab

If you want the greenish dreads, replace the .ytd with mine in OpenIV

For the mask install the p_head files into: mods/x64v.rpf/models/cdimages/streamedpedprops.rpf/player_one_p