the S15 i did has an open gap between the windows, so i just built a black interior to fill it and make it look "minifigure scale". Its a great way to keep the outside details for some nice builds or photos :)
Despite how it looks, it cannot fit a minifigure. i usually build a black interior or just fill the car with black tiles if its like that minivan i did earlier
Thats usually the case with legacy versions of a game. At least you can still access the Mini-pictures and somewhat "experience" the old days of ror using old mods or maps
though if you want to experience old ror stuff, heres a very old archive of old repo stuff. https://ror-mini-pictures.netlify.app/pictures
*just know some mods may have broken textures or mesh in general, so its sort of a mixed bag of working and broken because of age.
All those old versions are pressumebly erased due to lack of support or just corruption from age. It would be very difficult to find older versions so cant help you sorry.