Wow, that was another great reply (from Davide Cervone) with specific detail.
I think it should be posted on the WeBWorK introduction to authoring problem's page.
You and others are welcome to help out with editing the author page. The wiki is editable by everyone. And the author page (and many others) - particularly the parts for new comers - indisputably need updating and reorganizing. It's a matter of bandwidth and finding enough people to help out (or even more important to help organize the effort. :-) )