Voila ce que l´on m´a repondu sur le forum de SImPE:
Quelqu´un est il a meme de traduire cela svp ??
merci
I can only offer generic Help and Pointers.
Changing the apearance of the Taxi should be possible (never tried it myself). You clone it in ObjectWorkshop, but with all available Options unticked. This gives you an override Package.
delete everything in the package, besides the TXTR and LIFO Resources, and save it to your downloads Folder.
Now Import the LIFOs into the TXTR and save.
When you replace the Images in the TXTR Resources, the Taxis in the game should look like that from now on.
About the Price: I guess this is determined in the BHAVS. again, create an override Package for the Taxi, but this time remove everytning besides the GLOB, BCON and BHAV Resources. Now find the BHAV, that is collecting Money from the Sim, and change the Value. Remove every BCON adn BHAV you did not have to touch and save this as well into the Downloads Folder.
AS I said, those are just rough pointers. Hope you can make something out of it.