What you can use instead of Perspective is some skew on the right side (pardon my image, if you do it more carefully you will get a better result!):
What you do is paste your image in a new layer, go to
Edit > Transform > Skew, grab the right side (not the top or bottom points, the middle of the whole side) and move it down a little.
Then, make the image narrower by using
Edit > Transform > Free Transform (since it's in perspective, it's supposed to lose some width), or compress it like it's shown in this question's first answer (I didn't do that in my image, sorry!).
Finally, bring the layer to 75% opacity or so and repeat the process for other images.