How to write a Active Directory Documentation

Dear Forum,

I would like to find out if there is any proper way for doing active directory documentation. I have check and found that the following links:

http://blogs.technet.com/b/askds/archive/2007/10/12/documenting-active-directory-infrastructure-the-easy-way.aspx

But we are not supposed to install Visio nor other software into the server.

I have also found other useful information as below:

•Explain your computer, user, domain, and OU naming conventions.
 •Describe your OU hierarchy and the reasoning behind it.
 •Briefly describe the main functions of your Group Policy Objects and why you organized them as you did.
 •Describe your network numbering conventions and DHCP configuration, if applicable.
 •Describe your DNS configuration.
 •Describe your Windows Firewall exceptions.
 •List the the Windows Server roles and third-party software installed on each server.
 •Note the locations of Active Directory's FSMO roles.
 •Describe the organization's policy for when to add new user accounts or revoke existing user accounts.
 •Describe the organization's policies for user restrictions (related to GPO details above).
 •If you are responsible for the network as well, provide a building wiring diagram.

My question is that whether if there are any information worth documentating for Active Directory. I would appreciate for those who have been writing Active Directory to let me know.

Thanks and best regards, Kim Seng