This mod should change the sprunk machines into Pepsi
1.) open GTA3.img from Crogram FilesRockstar GamesGTA San Andreasmodels
2.) go to EDIT > FIND > (type) cj_ext_vend
3.) Then, once you find that rename it old_cj_ext_vend
4.) Then ADD this one go to COMMANDS > ADD > Pepsi vend
5.) Thats it. Start up the game and go have fun