Haha, Aau, I have to admit, I did shameless copy good parts of that guide and used it in my intro letter, please forgive me
But yeah, since my recommenders are all novices at B-school recommendations, I went through each question of the recommender form and listed bullet points of my qualities and an EXAMPLE from work that they can talk about. What was the initial problem setup? How did I go about solving it? What was the quantifiable result?
So the "how to write guide" was a summary of Paul Bodine's last chapter on recommendations, that took 2-3 pages. Each school had about 5-8 questions, so each one I gave an example drawn from my work, and that took about 4 pages each, thus roughly 22 pages (with blank spaces here and there too).
The rest is just for reference, they can never look at it if they don't want to.