Back in July, I wrote a version of that tutorial for pre-release versions of Yosemite, but since I'm no longer at Macworld, I can't update that article for the final release of Yosemite. So I'm publishing final instructions here.
That's a stand-up move. Kudos to Dan.
Related: For convenience, the last couple of years I've used the excellent DiskMaker X, but there does't appear to be a final version for Yosemite yet.