http://www.adobe.com/support/techdocs/331372.htmlActivating the Photoshop CS2 Bigger Tiles plug-in
To enable the Bigger Tiles plug-in:
1. Close Photoshop CS2.
2. Locate the ~Bigger Tiles file inside the Photoshop CS2 plug-ins folder:
-- Mac OS: Applications/Adobe Photoshop CS2/Plug-Ins/Adobe Photoshop Only/Extensions/Bigger Tiles
-- Windows: Program Files\Adobe\Adobe Photoshop CS2\Plug-Ins\Adobe Photoshop Only\Extensions\Bigger Tiles
3. Rename the file, removing the tilde, ~ , from the file name.
4. Start Photoshop CS2.