Notice how the parking barriers at the airport and no parking signs around the city are all shown white? This modification will remove this strange problem and display them correctly.

Open models\gta3.img with an IMG editor and delete the following files:

lhouse_barrier1.dff
lhouse_barrier2.dff
lhouse_barrier3.dff
signs.txd
metal.txd
noparkingsign1.dff
parkingmeter.dff

Add the ones supplied in the folder and rebuild archive. Close when complete.

Update: Pointless Alpha texture finally removed from signs and resized slightly. Added missing textures for lights near parking meters.