malmon They truly are !
You can do aesthetics pimps if you follow the rules, so besides stickers not much. For real tuning exhaust mod is illegal in France (pollution, noise), intake is illegal I believe, maybe some that "don’t affect the structure of the car and its handling" are allowed but then insurance is mandatory and few will allow mods. Or against a hefty monthly payment. TBH even cars with more horses were unavailable to me when I started driving, insurance companies either flat out refused or wanted to gouge me. Even today you still pay more. Maybe if you’re rich and follow the rules.
Re UMDs : you are right they are ROM, I misunderstood what UMDgen did. So no way to print UMD today I guess. Apparently all the data is there you just need an optical-disc plant

Her dad got it used from some Fiat 500 collector and its a "Giannini" look-alike (not a real Giannini sadly).