We have some website visitors who are apparently reluctant to upgrade the Adobe Reader because they are concerned it will stop their Pro version of Adobe (in this particular case version 5) from working properly. Some of our more recent PDF distributions are not well-compatible further back than v6. Can anyone confirm that the free reader can be installed and upgraded as a separate application from Pro on the same machine? We are not in a position to force people to upgrade their computers but since Adobe Pro is so expensive, this seems like a valid concern. Would like to hear from people who have hands-on experience on this matter. My educated guess is that it can be done without difficulty but I don't have the time or the versions to exhaustively test it. Thanks.