1.put "stanley" folder in to **********\Grand Theft Auto V\update\x64\dlcpacks

2.use OPENIV edit "dlclist"file (update/update.rpf/common/data/dlclist)

3.put this line , in to the "dlclist"(     <Item>dlcpacks:/stanley/</Item>     )

4.may need "gameconfig.meta" and "GTAV HeapAdjuster.ASI"  ( if the game faild to loading , or crash) both could be found in GTA5-MODS

OPTION: This is for AddonSpawner 
5.put " stanley.list " in ( your game folder/AddonSpawner/UserDLC )