@Raval there is much more options than this for example vents or moving back glass on spyder cars, but it should be done first in the model. If you can't open sunroof using trainer you can't make it openable without editing model for sure. if model have openable sunroof but only using trainer and not by key, I pretty much think then you can do it just by editing meta files or any step without touching model, but never tryed this so have no clue how