Those with experience generally know how to get around that silly restriction - or learn how after the first incident with fsck or other start up issues that require root to fix, or "ctrl-D to continue" right on into rescue mode hassles (or failing those, re-installation) that can be avoided with diligent setting of the root password. As I recall from my recent Centos 6.2 installation that is done right after setting the time zone.
Of course, the idea of not using root for routine usage of apps/system is crucial to safe practices on all major distros (Puppy excepted...).
BTW, detailing the hardware you had issues with would be a service to the community in helping to pinpoint problem devices - those seem to make or break each individual's installation experience.
TIA

































