I have figured out how to convert the Carma2 .DAT file to NFSHS .FCE, I just needed a plugin for Zmodeler.
As I have posted before, I mainly intend to convert the following models: The LX5 from Road Blaster, The Shooting Star and the GRX from Speed Racer/Mach Go Go Go! By Econobrick.
However, trying to contact Econobrick has not been successful... If I cannot reach Econobrick, I am afraid that I cannot upload the converted vehicles. It would be unethical of me to do so.
So... I will continue to learn how to convert the cars, but until I get in touch with Econobrick, I cannot continue work or release the cars.