All cars in all levels mod is a mod that makes all cars spawn on roads in Downtown, Residential and Industrial districts in GTA2, including the unused cars Hot Dog Dummy 1, Hot Dog Dummy 2, Hot Dog Dummy 3 and Hot Dog Dummy 4, wich are simple hot dog vans with different speeds and acceleration. The Bus also spawns driving normally on roads with different colours on the stripe, but only brown-stripe buses appear picking up passengers.
To install it, open the .zip file (you must have WinRAR or 7zip installed to open it) and then open the installer .exe file (All Cars in All Levels.exe) and point the installer to your GTA2\data folder (by default its C:\Program Files\Rockstar Games\GTA2\data). It will then install the mod to the selected folder. Dont forget to backup these original files: bil.sty, ste.sty and wil.sty before!