In lieu of absolute pixel dimensions, you can also specify percentages if that is more appropriate for your needs.
While Photohsop readily supports such tasks through the use of actions, I’ve never found it to be as fast as ThumbsPlus, currently at version 6 and available in a trial version from <
http://www.cerious.com>. ThumbsPlus makes it very easy to rename the resulting resized image and save it elsewhere or overwrite the same image.
Regards,
Daryl