Before anything, Make sure you have OpenIV installed on your PC

Step 1) Choose wether you would like to have his eyes retextured or not.
Step 2) Extract ' u_m_y+babyd.ytd ' to another folder on your computer.
Step 3) In OpenIV go to x64e > models > cdimages > componentpeds_u_m_y.rpf.
Step 4) Make sure OpenIV Is In edit mode.
Step 5) Drag the file you extracted Into OpenIV.
Step 6) Finished, Launch the game and change to BabyD, through a trainer.

If you want to Uninstall this texture or you mess up somehow repeat all the steps just use the ' u_m_y+babyd.ytd '  from the backup folder.