I was looking at your script and the model for the plates. I saw that each digit on the generic plate bodygroups a specific digit (one position is for a letter, another for a number, etc.). For the L4D version, it's similar, but one of the numbers is changed to take letters instead.

Honestly, why not just make the standard plate universal? Just make any of the positions use letters OR numbers, and then when setting up the plate "group" file, the group defines what materials it uses for the text and background, and you can tell it which bodygroup to use for each position (either pick between letters, numbers, or either one)? This could also potentially allow for vanity plates too, since letters and numbers can be interchanged with each other.

That would make things work a lot better. That way if you want different lettering, letter textures or background, you can just tell it to swap mats and to tell it to use specific bodygroups, rather than making an entirely new model for each mat and for specific lettering. Also, maybe bring the digits closer to the plate so the floating is less noticeable.

And of course, if people want to make their own license plate models (say someone makes an HD model), they can define so in the plate group file to use that instead.

Another thing to bring up possibly is the ability to define the average time it takes for a car's ignition to start. If not defined in a vehicle's lua, it just takes the default amount of time. But if you've got, say, an older car, or an old beater (that's not actually "damaged"), you can tell it to take a longer amount of time to start. Also, some larger trucks and lorries might take a little longer in general to start. Or if you've got an electric car that turns on rapidly, or a high performance vehicle that starts quickly as well.