(For easy install) 
(require to install EMF) https://www.gta5-mods.com/tools/car-weapon-folder-for-replacer

Drag and drop all the files to EMF/commonpeds.rpf

(Regular install)

Drag and drop 
 a_f_y_hiker_01.ydd
 a_f_y_hiker_01.ymt
 a_f_y_hiker_01.ytd
 a_f_y_hiker_01.yft
to x64v.rpf\models\cdimages\componentpeds_a_f_y.rpf

Drag and drop 
 char_hitcher_girl.ytd
to update\update.rpf\x64\data\cdimages\scaleform_generic.rpf