|I assume you already know this:|
#10 is an interestng idea, although you would expect .cda files with no size shown. No harm using a ripper on it - it won't touch the disk and, as said, it might produce "something" - not sure what LOL.
Is it the same if you right click the CD in "Computer" and choose explore?
If you can get an iso off it and onto an HD, try chaning the iso extension to zip then click on that and see if it shows anything.
Always pop back and let us know the outcome - thanks