I have Elements 2, derived from PS7, so i'll try to help. On the top bar, to the far right, there is an Icon with more options written under it, if you click that, at the very bottom is a checkbox that says tablet support. For installing brushes, the path on my mac is Photoshop folder>Presets folder> Brushes folder. Just drop them in there, and restart, it should load them when it launches.