How to use this misc:
-Open taxi.txd that u just downloaded using the TXD workshop
-Look for an image/texture with the same name as the three new images/textures (opd_stuff, plate& taxi2_signs_1)
-Replace them with that new images/textures by importing it
-Save and open your SA 
-Get to the TransFender (in-game autoshop) and paint your car there.
-Enjoy!
