. Perhaps not for the regular cars as they aren't named so clearly.
That is the thing.

There are at least three Taxis in the game.

But I think I can sort it out if I am patient enough.
@Vester Yes, we were talking about ILive Reader's Navigator tool. Sadly no super special program.

To test this automata modding I did try to use a bus model from another game. Cities in Motion 1. It has better car models than in SC4 but still relatively low poly. I have tried several times but I have not been able to introduce these into the SC4 environment.
I have read Vester's and Ceafus tutorials, but so far I have not been able to get a new automata in to the game. I get the model and the texture showing beautifully in the iLives Reader's preview, but it will not show up in the game.
http://simmania.darkbb.com/t535-a-basic-automata-making-tutorialYesterday I did what Robin suggested and took a Maxis bus replacement. First all buses were gone in the game. So my override failed. Then I went carefully step by step. I checked I had inserted a 3ds model file, named it, set it to refer to right group number, deleted extra groups and materials and most importantly remember to push "Apply" button. This made a city to crash while loading. So I guess it is a sign that insertion succeeded, but there is something wrong in the file or model.
Vester's tutorial is missing a few crucial pictures, but I can't figure out what I am doing wrong

Perhaps something with the Groups or something I am doing with the Anim or Mats Tabs.
I tested with Cim 1 Routemaster model. It has 991 triangles. Could it be too complex for SC4? Just for a test I tried a simple Sketchup model but that too was a no show in the game.