Install here: Grand Theft Auto IV\GTAIV\TLAD\pc\models\cdimages\playerped.rpf\
Extras include: Brown Boots, Black worn jeans, Denim jacket+Sleeveless cut
YOU NEED TO USE EITHER THIS TEXTURE: https://www.gtainside.com/en/gta4/skins/28456-sleeveless-jacket-2
OR THE DENIM JACKET TEXTURE INCLUDED IN EXTRAS