Installation:

0. If you have an older version of the mod installed ("pup" folder) - remove it!

Add-on installation:
1. Go to "Add-On" folder
1. Move "w_pup" folder with its content to [Grand Theft Auto V]\mods\update\x64\dlcpacks\
2. Add the following line (without quotes) to dlclist.xml at [Grand Theft Auto V]\mods\update\update.rpf\common\data\
"		<Item>dlcpacks:/w_pup/</Item>".

3. Optional: install "vehicles.meta edit.oiv" file with OpenIV package installer.

Replace installation:
1. Go to "Replace" folder
2. Move trailers3.yft, trailers3_hi.yft, trailers3.ytd and trailers3+hi.ytd to [Grand Theft Auto V folder]\mods\update\x64e.rpf\levels\gta5\vehicles.rpf or to a vehicles.rpf in any patchday folder.
3. Add FLAG_HAS_LIVERY FLAG_EXTRAS_STRONG to <flags> vehicles.meta section of trailers3 entry.