The Adobe Photoshop 9.0.2 update fixes a number of problems discovered after Photoshop CS2 (9.0) was released. The Photoshop 9.0.2 update includes all the fixes contained in the earlier Photoshop 9.0.1 update. Therefore, it is not necessary to apply the 9.0.1 update prior to running the 9.0.2 update on Photoshop CS2.