[font color=\'#000000\']rickster, I don't have a link, but it is pretty simple. Go to Edit, then to Transform, then Perspective. Grab an upper corner and move it in or out, and the other corner moves as well. The image changes perspective. Skew works in a similar manner, but one corner at a time. When done, go to the Crop tool, and click Apply.
If Transform isn't available, make a duplicate layer and try again.[/font]