Path to replace the Shoes (you need to put the x64.rpf into your mods folder):
C:\Program Files (x86)\Steam\SteamApps\common\Grand Theft Auto V\mods\x64v.rpf\models\cdimages\streamedpeds_mp.rpf\mp_f_freemode_01\feet_013_r.ydd
Recommend using Dirty Cloth Tool or MpClothes
Credits:
SailorBachi