Batch command in Photoshop

Okay, could someone help me out here? I have CS2 Version 9.0 and for the life of me, I can not figure out how to batch convert my PSD files to PNG or JPG files. Because I've made a lot of icons and would like to save a lot of time in saving them if there is a batch command, so hopefully this is allowed. I know how to do it in PSP, but of course when I have files with Selective Colour, I can not use them because PSP does not have Selective Colour. Anyone?

Cross-posted.