It's in desperate need of some formatting. Download a few professional manuals or guides and take some notes on how they look. Pay attention to:
Font faces & sizes
General layout & spacing
Chapters or Headings
Make your title font size larger than the body text, and BOLD it or something to make it stand out.
Also, don't link to the i386 build since it's being deprecated.
Do as John says and use a virtual machine so you can create clear screencaps instead of fuzzy photos with flash flares.
Don't put your images inline with your text or it just looks like a jumble.
VLAN, not Vlan.
I could go on, but the major thing seems to be you're installing in one particular way and you don't talk about other options. Any time the user has some sort of choice, you need to explain the available options and what they mean instead of just saying "Do this", when it may not apply to that user. For example, you say to enable DHCP on LAN. That can cause major problems if the user already has a DHCP server.