I don't believe GTA is incapable of operating car mods. Having a larger model size which tolls more memory isn't proof of incapability, it sounds like more of an excuse to me. Honestly, nobody here is experiencing game crashes due to modded vehicles... They experience game crashes when they use LCPDFR along with the modded vehicles.
Don't get me wrong, I can see where the technical requirements to run such mods is increased, but it doesn't render the game incompatible.
I am not trying to come off in a negative manner, so don't take it that way. But to solve a problem we must first acknowledge that there is a problem, and not turn your backs on the ones who experience these problems. I joined this website because you guys have an amazing idea for a mod, it makes GTA IV worth playing again... But I am seeing a very strange support atmosphere here which I believe may be prolonging the ability to resolve problems.