These handouts are for Photoshop in CS2 - and the lab was recently updated to CS5. So over the coming year I'll be updating these.
An introduction to using a scanner within Photoshop
An introduction to elementary photographic adjustments in Photoshop
An introduction to building up your images using layers in Photoshop
Cloning, repairing and retouching photographs
A series of techniques which can lead to print type output
A guide to Flickr