GNU/Linux Desktop Survival Guide
by Graham Williams
Obtain a LiveCD distribution, such as Ubuntu from http://www.ubuntulinux.org or Morphix from http://www.morphix.org. See Section 3.1 for other LiveCDs based on Debian GNU/Linux.
Boot your computer from this CD and you will have a running system (but not yet installed). There is then an option with most LiveCDs to then install itself. You will end up with an installed Debian GNU/Linux system. Note that it may have some subtle differences to a standard Debian install, but it may not be a problem.