Just a thought...
On your site, whenever there is a box to fill info into, you have a little question mark (?) next to the box. If a user clicks the "?", they get an explanation about what the box is for. That's good.
Did you think about using the free overlib.js script from http://www.bosrup.com/web/overlib/? You simply hover your mouse of the "?" in order to get a little floating box, that disappears with mouseOut.
I would think that would be easier than clicking. You could probably still have the click option available for folks who needed to do a big study.
Just a thought.