[Buildroot] adding support for a new board

[Marco Trapanese]

Hello,
I'm reading through the documentation how to add a support for a board.
In particular I need to run buildroot on this board:

http://www.advantech.com/products/1-2JKBYZ/ARK-1120F/mod_4be6fe03-9aa1-4097-a9b1-8977a7a49289.aspx

The buildroot documentation says: "[...] create a normal Buildroot 
configuration that builds a basic system for the hardware: toolchain, 
kernel, bootloader, filesystem and a simple Busybox-only userspace. "

Is there any step-by-step tutorial to help during the configuration of 
mandatory parameters?
I'm not sure which ones I should check and what information I need to 
know how to set them.

Thanks
Marco