Install:
Use OpenIV and just drop g_m_m_korboss_01, g_m_y_korlieut_01 and g_m_y_korean_01 files to Grand Theft Auto V\mods\x64v.rpf\models\cdimages\componentpeds_g_m_m.rpf\
g_m_y_korean_02 files to Grand Theft Auto V\mods\x64v.rpf\models\cdimages\componentpeds_g_m_m.rpf\
Drop all hats/bandanas files to Grand Theft Auto V\mods\x64e.rpf\models\cdimages\pedprops.rpf\
Skull tattoo korean_01 face has been added in the 6.1.6 version.
Credits:
bkestside