The pics were just gotten from searching various sites for images.
Modifications are easier to do on the pc, bit obviously not required.
As far as how I cropped the icons, I used the crop app made by the same company that made Desktop Visualizer (paid) to do that. Much easier than attempting to perfectly size the pics first.
Icon spacing is all a matter of how many rows and columns you have on your screen, the more you have the closer the icons will be. Too many and your icons will overlap. I worked on this by starting with the standard 4x4 and filling it with 16 1x1 gmail widgets I created. It look a while and was probably excessive, but it let me know how close everything would be as I adjusted the columns and rows.
Hope any of that helps. And if you're already using the crop software and I misunderstood let me know.
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