Your tutorial is pretty cool. But I think pen tool is more useful to remove a background. yes you can change background by using magic wound but it will never be perfect for a little difficult image. Here you can checkout a full tutorial about removing image background by using photoshop pen tool.
See the full system requirements for both versions of Photoshop, including tested and recommended graphics cards*. For the 3D capabilities in Photoshop Extended you want to have a supported GPU with fully up-to-date hardware drivers.
Adobe Photoshop CS6.13.0 Portable Full Version
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