To install a livery:
1. Open OpenIV.
2. Go to Edit mode.
3. Click "YES" when prompted.
4. Navigate to:
   mod > update > x64 > dlcpack > epic_528655785 > dlc.rpf > x64 > levels > gta5 > vehicles > vehicles.rpf.
5. Find "epic_528655785.ytd," right-click, and select "Edit" from the options.
6. In the opened window, locate the livery file you want to replace, right-click it, and choose "Replace."
7. Select your custom livery file from your computer and click "Open."
8. Close OpenIV and launch GTA5.