1. Start OpenIV.
2. Go to: C:\Program Files (x86)\Steam\steamapps\common\Grand Theft Auto V\mods/x64e.rpf\models\cdimages\componentpeds_ig.rpf\
3. Replace Model Example ig_bankman.ydd ig_bankman.yft ig_bankman.ymt ig_bankman.ytd
4. Start In Game

or

Use this mod to use Peds as Add-Ons
https://www.gta5-mods.com/scripts/addonpeds-asi-pedselector