Hey, this is not really related to WB, but since so many times a picture can help when trying to explain stuff, I figured I would share this.
http://pearlcrescent.com/products/pagesaver/It's an add-on for Firefox called Page Saver. It adds screen capture functions right into Firefox via a lil button on your navigation toolbar.
It has options to capture just the viewable portion or the entire page... you can designate the saved name or set it up with auto-naming.
There's a premium version that lets you do a few extra things like capture only a potion of a page, put the captured image in the clipboard, or submit it automatically via ftp... but the free one does everything most folks will ever need.
The captures I've gotten from it are pretty good... so next time you need to "show" us something you need help with, check out Page Saver.