This mod will change all billboard pictures to:
Eazy-E - Ice Cube - Notorious B.I.G - Death Row - Dr.Dre!

INSTALLATION:
Put (Billboard Mod) File in Modloader. (Easier for beginners)
OR
Open IMG Tool click "File" Tab and click on "Open". go to your game directory >> Models >> choose Gta3.img.
Then click on Commands tab, choose Replace, replace the files! DONE!