You can click the 'download file' link to the right of the comments, then open the zip folder and then move the brushes file into the Presets folder in the program folder for Photoshop. (Providing you have windows, go into My Computer, then Local Disk C:, then Program Files, then Adobe, then Photoshop, then Presets. You may have to right-click, click properties, then click 'show hidden/system files').