the best way to do a new motherboard is find one that is almost the same in the mainboard tree, and make a copy of that directory, and tailor it as needed.
So, for example, if you have a motherboard that is a lot like src/mainboard/digitallogic/smartcore-p5, and it is called the Noblet Fineboard, then you would do this: mkdir src/mainboard/Noblet/Fineboard cp src/mainboard/digitallogic/smartcore-p5/* \ src/mainboard/Noblet/Fineboard
Then you modify the Config file in that directory to match that mainboard.
ron