re the obtaining a copy of the data that is on the disks that you cannot read by other means... while peter is right that it technically is a grey area, I can see 2 points of view on the issue.
from the vendors perspective its not their problem that you are unable to access the media you have .... and any attempt to bypass that in some cases could be viewed as piracy.
from the user perspective. you have a legal copy of the game so "fair use" or the equivalant should allow you to transfer the data to a useable media, as long as you do not share sell or similar, without transferring ownership of the (unusable copy) along with the useable media copy.
note I am not saying I agree or disagree with either perspective and I do not avocate piracy I am just saying that from a certain point of view being unable to use software because the media is incompatable with your computer is in effect (theft by the vendor) unfortunately I am not exactly clear how the legal system views it but then again I have seen some rulings that make me wonder about the legal system from time to time.