Tutorials...

to make an action sequence:
http://vodpod.com/watch/1228735-how-to-make-a-sequence-in-photoshop-

to make a photomerge:
http://photoshop.digitalmedianet.com/articles/viewarticle.jsp?id=377580

http://www.creativepro.com/article/auto-stitch-with-photoshop-cs3