Install rock_fwc DLC into: Grand Theft Auto V\mods\update\x64\dlcpacks

Navigate into: Grand Theft Auto V\mods\update\update.rpf\common\data and add line "<Item>dlcpacks:/rock_fwc/</Item>" to dlclist.xml

Install EUP Shirt to: Grand Theft Auto V\mods\update\x64\dlcpacks\eup\dlc.rpf\x64\eup_componentpeds.rpf\mp_m_freemode_01_mp_m_importexport_01

Install Pants to: Grand Theft Auto V\mods\update\x64\dlcpacks\eup\dlc.rpf\x64\eup_componentpeds.rpf\mp_m_freemode_01_mp_m_gunrunning_01\lowr_000_r