We used to let one of our non-technical friends, who hasn't had a single hour of computer education in his life, install Red Hat, Mandrake, FreeBSD, openBSD and Windows. -For fun, to see him struggle, but also out of interest which would succeed and where he'd get stuck. Guess what????? He managed to install Mandrake and Readhat, had a lot of trouble with windows (but succeeded mostly, only display & audio drivers were 'forgotten'), and absolutely failed at FreeBSD and OpenBSD, because of the disk partitioning (slicing) procedure. The reason he succeeded at both Readhat and Mandrake: these installations only required the user to press enter a few times and seemingly randomly installs packages, based on available disk space.