From my experience, this would update to other 6 versions, but not to version 7.
Note: If you have other Version 6 Adobe products, such as Adobe Standard, to create PDF files do not uninstall Version 6 of the reader as you will run into difficulties previewing the documents. You can install version 7 and retain version 6 and both will work. Your own program will use version 6 and any files on your drive will open in 6 by default, but PDF files from the internet will open in version 7.
Another suggestion: If you want to install an older version or run into the Insert CD problem, go to this page: http://www.adobe.com/products/acrobat/read...llversions.html
Select your operating system and language then hit continue. You will then see a page with older versions of Adobe Reader which you can download. For the insert CD problem, download to a disk or flash and I think you could use it in lieu of the CD.