If you've backed up your game clients on CD-R, DVD-R or memory stick, you can just copy them onto a new machine and you're good to go. Or if you have your original installation disks for the game, you can reinstall from that. Keep in mind, different versions of the client will have an effect on the way the demo recordings playback. In issue 17 and earlier, you'll have sound. In issue 23 or 24, you'll have the ability to unhook the camera. Each client will also be using the maps from that era's COH, not necessarily the one when you recorded it. As a result, your character might find himself waist deep in concrete in a rennovated portion of Atlas Park, or you might find the monorail coasting through the air instead of tracks that were rerouted.