Server 2008 Server Core step-by-step Install Guide:
The Server Core step by step guide is now available
To download in Microsoft Word Document format
also the Server 2008 Technical Library is available
The step by step guide covers how to do most everything with Server Core, from initial configuration, role installation to command line and remote management. Please let me know if there is additional detail that you would like to see included.
There are also a set of scenarios posted and a survey on Server Core at:
In the left tree, select Server Core and the first item in the list “Tell us how you deploy, manage, and configure Server Core” is a survey where you can provide feedback. The other options in the list allow you to comment on the usefulness of sections of the step by step guide.