Wait, but the user specified "All Domestic Discs 198..." – maybe they want data for all domestic cars starting from 1980s models. So they might need to verify that all discs from a certain series (like Discs 1-198?) are installed correctly. Maybe the setup requires inserting each disc one by one and selecting options for each. Could there be dependencies between discs? Or perhaps the discs are numbered 198 and beyond, and the user missed some. Maybe they need a way to check if all required discs are installed or to reinstall specific ones.