Photoshop CS2 uses complex memory management procedures. On computers with 1 GB of RAM, or more, you can optimize Photoshop to take advantage of the quantity of RAM in your system to manage memory more efficiently. For further information on how to implement the "Bigger Tiles" Plug-in please refer to Knowledgebase Document 331372 <http://www.adobe.com/support/techdocs/331372.html>