If you would prefer to use HD Universe CJ instead of Legenddarios9991 CJ then follow below.

In Open IV, in edit mode.

go to "mods/update/x64/dlcpacks/CJClassic/dlc.rpf/x64/models/cdimages/streamedpeds_players.rpf/player_one". 

Inside of this folder is all the texture files for Legenddarios CJ, Delete all of these files from that folder.
Then simply drag and drop the files FROM HD Universe CJ into the "player_one" folder. 

Then in the HD Universe CJ mod there is two files "CJ.yft" and "CJ.ymt" simply rename these two files 
to "player_one.yft" and "player_one.ymt" drag and drop these to "streamedpeds_players.rpf" over the ones that are there.

If you are getting bent legs on CJ then refer to the CJlegfix folder.
Thank you for reading.