You can upload the action (when I get it here) and in Photoshop you can run it and examine how it was done. That's what I did, and when I figured out how it was done I applied what I learned from that action to create my own design, as in this example here:
http://www.photoshopgurus.info/forum/viewtopic.php?t=4031
If you click on the small arrow in the upper right hand corner of the Actions palette you can choose to Set Playback Options - pick Step by Step, or have it Pause for a certain amount of time, that way you can examine each step of the action and examine how it was done.
Once you see how the effect was accomplished then you can use the methods in your own designs.
http://www.photoshopgurus.info/forum/viewtopic.php?t=4031
If you click on the small arrow in the upper right hand corner of the Actions palette you can choose to Set Playback Options - pick Step by Step, or have it Pause for a certain amount of time, that way you can examine each step of the action and examine how it was done.
Once you see how the effect was accomplished then you can use the methods in your own designs.