1. Open OpenIV
2. Go to GTAV/x64v.rpf/models/cdimages/streamedpeds_players.rpf/player_one
3. create backup of:
uppr_diff_004_c_uni.ytd
4. Extract files from this zip to a folder
5. Make sure to enable edit mode.
6. Replace the file with the Real Madrid Shirt
Credits:
Totti Rumeno