the biggest problem with that is that a lot of modders don't bother sorting the scripts out which means that with my modified physics cars will jump around in the garage and will be undrivable(for e.g. robbans volvo)
there's a work-around for this but it takes quite a bit of time to do and i would need to do it for all of the cars i have made and this is only one problem i have found.. there could be more because of lazyness/betas etc.. easy fix on robbans volvo but the others will be harder