1:First, Unzip any downloaded sets to be loaded.
Open the folder that contains the brush set and copy to:
C:\Program Files\Adobe\Photoshop\Presets\Brushes
2:Open Photoshop. In the Brush options bar
(at the top of the program) select the down arrow to
access the Brush palette.
3:Now in the Brush palette, Click on the arrow to the top right of the palette. A menu will appear with all brushes loaded to the library. Select the desired set. (A dialog box will appear, hit OK).
4:The brush set is now installed and ready to use.