Quick question about Photoshop (CS2 specifically)..

Is there any way to edit batches of pictures at once? I have about 40 camera shots that I want resized, each to a certain percentage of its original.. but I hate having to go through and do it to each one.

Anyone know if there's a way to resize them all at once? Thank you!!

Edit: Thank you to everyone who responded, my question has been answered. :)