-EXTRACT MY FILES
-OPEN TXD WORKSHOP
-PRESS OPEN IMG AND FIND YOUR GTA3.IMG
-SEARCH THE WEAPONS WITH .TXD (E.G:AK47.TXD)
-SELECT THE WEAPON FILE
-SELECT THE ICON OF THE WEAPON
-SELECT IMPORT AND SELECT MY ICONS
-AFTER THAT PRESS SAVE TXD
-AND DONE :)


credits:Zera for creating the layer