I dusted off my old You Don't Know Jack CDs and tried to play them. They were originally designed for some ancient version of Windows. I tried doing the install of both YDKJ1 and YDKJ2 and neither would complete. Various errors, or timeouts they just wouldn't work. After some fiddling around I found that if you install them on a Windows machine, and then copy the folder to your Linux box and run it through wine it works just fine. The engine works fine under Wine, it's just the installer that fails. So I can play YDKJ on my Linux box now!