Hello Guys! 
1) Open the OPEN IV application
2) Click "Edit mode"
3) Drag & Drop the files into the path location 
Drop Hoodie Here:Mods\update\x64\dlcpacks\mpbiker\dlc.rpf\x64\models\cdimages\mpbiker_male.rpf\mp_m_freemode_01_mp_m_bikerdlc_01
Drop Pants Here:Mods\update\x64\dlcpacks\mpimportexport\dlc.rpf\x64\models\cdimages\mpimportexport_male.rpf\mp_m_freemode_01_mp_m_importexport_01
4) Done & Enjoy!

For questions or if you need any help Dm me on Instagram @HoneyBrasi