Frankell,
What I do is this:
I have 4 docks on my screen at any one time. The zoomer at the top, the tabbed dock at the bottom and the singel tabs, either left or right. I will usually take a screenshot of the zoomer in action and at least one tabbed dock showing (click on the actual tabbed dock and it will stay put, then mouseover the zoomer). Then, I might change the background of one of the docks and move it somewhere else on the screen, take another screenshot etc.
It is important to note, you must take an ENTIRE screenshot, meaning from the upper left corner all the way to the bottom right corner.
When you have your shots, open your graphics program and open one of them. Then just import the others into that and line them up at the upper left hand corner. Once that’s done, remove what you don’t want by deleting it. If you took good, same size screenshots, the background (wallpaper) should always be lined up and it will look like one “desktop”.
Sometimes I’ll put in 128x128 versions of the tiles and actual size version of the zoomers somewhere on the canvas. Then, I just add my signature and the name of the docks and viola!, a wicked looking preview.
If there is a genuine interest in a graphic tutorial on this subject, I'd be happy to do one. I'll post it at the wiki.
