Use this script to save each layer into files http://www.scriptsrus.talktalk.net/download/Layer%20Saver.zip. When you save them in seperate files you can create an action which makes the Image -> Trim move to cut the layers transparent pixels which you don't need for every file.

Use this script below to save each layer into files. When you save them in seperate files you can create an action which makes the Image -> Trim move to cut the layers transparent pixels which you don't need for every file.

You can download the script from here.