MP Male install: mods>update>x64>dlcpacks>mpbiker>dlc.rpf>x64>models>cdimages>mpbiker_male.rpf >mp_m_freemode_01_mp_m_bikerdlc_01.
MP Female install: mods>update>x64>dlcpacks>mpbiker>dlc.rpf>x64>models>cdimages>mpbiker_female.rpf >mp_f_freemode_01_mp_f_bikerdlc_01.
Texture name is the same for both characters, so no need for renaming.
Enjoy! -EcLiPsE-