I've used the cold technique myself, on a number of subjects, but haven't had a bad one for a couple of years. Anyway, the Evening book sells both as a "final" version, and as a "rough cut." If you buy both, you are then allowed to download versions as he updates them, and then the publisher mails you the final published version. Works for me. I also have Michael's Lightroom disks (both of them) and they're fine, but what I really wanted was something to sit next to my elbow as a prompter.
Actually, if somebody has Michael's disk, a worthwhile contribution to the world would be a PDF "index" on the different subjects, giving you DVD timecode for where specific subjects begin. If I get the time, I might do it myself...