I have downloaded demo ISO disks of Knoppix and Mandriva.....just to see how Linux 'feels' and was able to boot from those disks and get running.....but then just finding my way thru the file system and knowing what to click on just to FIND my own files was tedious. The system of naming the parts with arcane abbreviations only makes sense after you KNOW it....and finding a simple guide? HA! As mousethief notes, they seem to think it beneath them to spell out the baby steps to get beginners started.
   I managed to clunk my way around a few times, but if I didn't do it regularly, I had to relearn it. I can't imagine trying to sort out the layered, ever-changing bits to do what mousethief is attempting.