Copy the "scripts" folder to your GTA V Installation Directory (same folder where GTA5.exe is located).

Install w_me_hammer.ydr and w_me_hammer.ytd to
Grand Theft Auto V\mods\update\x64\dlcpacks\patchday3ng\dlc.rpf\x64\models\cdimages\weapons.rpf\

Install any ped model if you desire.

.INI files within the \scripts\Thor Files\ folder are profiles. You can create many, many profiles, each with a different
ped or weapon model assigned to it.
Explore the in-game menu to see the various settings you can configure for each profile.