Problem: Do cd labels influence installers?

[Yogiz]

So if I want to get these three games' backups working, I'll have to find the original cd-s and check their labels. Then change the copies labels to be same? Is it possible to circumvent the label checks in setups, perhaps changing the label name that gets compared against? Also is there some way to find about protected installers based on games so I could be sure that this is in fact the problem?

Thanks for replying.