If you use Photoshop on a regular basis you probably have made customizations to the way that Photoshop functions. A common thing to modify or add to the default Photoshop configuration would be actions. Actions allow you to record multi step processes so they can be repeated easier in the future. One of the more common Actions that might be created would be the batch modification of a set of images as described in a QD article located here.
The actions described above are stored in your Application Data folder so knowing exact location will allow you to back this file up in case you ever need to restore it in the future.
Windows XP Location: C:\Documents and Settings\<user>\Application Data\Adobe\Adobe Photoshop CS4\Adobe Photoshop CS4 Settings
Filename: “Actions Palette.psp”
If you want to restore this file either because the file was lost or if you even want to transfer these settings to another computer simply close Adobe Photoshop CS4 first. Then copy the backup into the folder mentioned above and restart Photoshop CS4. The actions will automatically be loaded into Photoshop for immediate use.
If you have not upgraded to CS4 you can do so by purchasing the below upgrade.