Brushes Photoshop CS2 (Creative Suite) is a “plugin” that can expand your Photoshop CS2 function. With brushes you can create complex effects objects just in simple clicks, even just in a click you will see your awesome object. In fact, brushes are plugin that you can add them in every photoshop versions. Although they are made in CS2 you still can use them in other versions CS3 or CS4.
Check this watercolor photoshop CS2 brushes out.