Look at the various computer museums and organizations that deal in archiving old technology. They have been dealing with this problem for years. It could be as

Look at the various computer museums and organizations that deal in archiving old technology. They have been dealing with this problem for years. It could be as simple as mirroring the website or service and firing up a virtual machine with windows 2000 and Adobe Flash installed. Thats easy compared to dealing with old magnetic media like floppies and reels. It's time for flash to die.