Ph CS5] Resize photos with Actions

Hallo,
I would like to resize a collection of photos, just to set in my a Storyboard: quality is not so important but, sometimes, I should to print this Storybord...

I'd like to use Actions to make this operation and ?'d also like to know if ther is problems with horizontal and vertical photos (maybe I've to make two separate actions for vertical and horizontal photos?).

And what have I prepara before, which Folder? One folder for original, One Folder for thumbnails )vertical, Horizontal?)...?
What is new with Actions in CS5? Maybe nothing..

Could you help me?

THX!