The sections on preparing for installation do not sufficiently address a real
process flow in terms of preparing boot media vs. actually booting from media.
The document should discuss how to download images and prepare boot media before
the process of booting from the media. I am marking this as blocking bug
173735, since this will help make the process easier for new users regardless of
what kind of installation source they use.
Finished draft reworking, enough to close this bug and unblock.