Ok I have figured it out and fixed all of them, they are all now stand alone cars, thanks to peters tool s3oc and s3pe, the cars will not effect other cars in game, they will work by itself and the school and taxi will show up when not owned a car.
You can get the file here, Have to put upload to another site, file is to big to upload here.
I have tested it all and the only one that will make your town non playable is the police car
Please Take the Police Car out of your Mod folder, I even did a new clone with the s3oc and still did the same thing, till I can or someone else can get it to work the police car is the only one you can't buy. just use the cheat and become a police career to get the police car.
THE Police Car is not Compatible for WA
http://www.megaupload.com/?d=4KOKS7P5