I just received an email from a reader that they found that Google is now able to index and read ISO formated file types, you know the CD images. Jon, the reader gave several examples:
To view an example click the following link: http://www.google.com/search?q=filetype%3Aiso+knoppix the results page shows not only CD images with the word Knoppix in their name but manages to find instances of the word within the image itself. I used the filetype parameter so the results page would only display ISO images for simplicity. However Google searches for instances of words within CD images whether or not you specify file type restraints as you should be able to see here: http://www.google.com/search?q=%22@echo+Lade+%22index.html%22...%22. In that example Google finds the query within a batch file (.bat) that is in each of the CD images.