You’ve got approx 500 pics from your holiday. Do you have about 2-3 extra hours to name them something other than DCP00143_23.jpg? I don’t .
Try this:
* First, open the folder and select View > Thumbnails.
* Click the last picture in the folder you want to rename, hold down the Shift key, and click the first picture; this will select them all.
* Right-click the first photo, and select Rename from the drop-down menu.
* Windows XP will highlight the filename for the first photo, enabling you to give it a descriptive name.
* After you type in the name, click the white space outside of the photo and watch as Windows applies the name with a sequential number to each picture in the folder.