My previous blog is about to download Adobe Photoshop CS3 extended and my this blog is about Adobe Photoshop CS4, this comes with very new features and upgrade tools such as 3D engine tool by which you can directly paint 3D modules. You can convert gradient maps to 3D objects, make 2D pics to 3D. It comes with improved features and have capabilities to scientific imaging, you can make 3D modules or can edit your images very well. Download free trial version.
Download Adobe Photoshop CS4 extended from these sites.