Do you believe that TIF images would be more suitable for this application than JPG?

Also, with regards to PDF, I would suggest a strategy of using both, text and PDF, if time and space allow. Yes, PDF is not an open standard and runs the risk of changing over time. But it has been one of the more stable proprietary file formats in the industry and it does offer so real benifits for archiving. Two features in particular, one is that it retains the original source tool format, which can make understanding of the content easier. Two, it can be indexed using the Catalog feature. You can index the entire contents of the CD and be able to retreive a required document in seconds. Again, I would also archive the same content as text as a failsafe.