TOT,
If you can see that the files exist on the CD, then they are there. Can you copy the files to your PC? Do they have a .doc / .xls extension? When you double-click the files does Word / Excel start?
If the answers are all yes, then you have not got the right password. The password is associated with the file, not the version of the application, so passwords are not affected by the version of Office.
If the answers are not all yes, then you probably have corrupted files - the CD/DVD is corrupt, or not readable on your PC.
If you have lost the password(s), try googling for "word excel lost password"
SD