1. First download your chosen brush set. If it is compressed in an archive such as .zip, the first extract .abr files into any folder. Each .abr file can contain multiple Photoshop brushes. Open the Photoshop.
2. Select the Brush Tool
3. Right-click on the image area in the Photoshop. Click on the menu button in the top right corner of the popup and select option "Load Brushes...". Now, select the .abr files you have downloaded and click "Load".
There are a couple of free brush viewers such as BrushView and ABRviewer. If you use mac, you can buy Brush Pilot. It is very handy and nice: you can manage all your brushes with it and it can find all Photoshop brushes on your computer.
You should first consult the license of the brush set. You can also contact the author of the brush set for permission. Usually brush sets can be used in both commercial and personal project. However, you may not redistribute these brushes in any shape or form.
Usually the brushes will work fine in all Photoshop CS versions. However, sometimes we indicate in which specific version of Photoshop the brush set will work.
Yes, these brushes work on both. They are platform independent, they will work wherever Adobe Photoshop is installed.
No, you can download the brushes absolutely for free without any registration.
None of the brushes can be downloaded for redistribution purposes. You are welcome to link to the the page on our website displaying the brushes, in order to direct others to download them.