If I understand you correctly, you are able to load and play PR702 files on your PR804 that you saved using your PR702? If so, great!

If your trying to use the original disks from Technote then thats different. Here's what I think. The Technote disks are in PR700/900 format. These can load and play on the 02 and 03 PR's, why the keyword compatible.

Sorry to disappoint you, but you will have to find someone with a 02 or 03 PR series and is willing to convert the files for you.

Anthony