I figured it out.
To enable this in Vista, with Photoshop Elements 6:
I placed the action (.atn) files here:
C:\ProgramData\Adobe\Photoshop Elements\6.0\Photo Creations\filters\
I took the included PSD file with all the icon layers and created a PNG for each layer, to match the .atn file names, for example:
Transform Selection.atn
Transform Selection.png
The names must match and the png files go right in the same directory. Restarting PSE6 enables the filter, and I was able to see it in the palette when I selected "show all".
Works great, though it does complain if you attempt to make the selection (in Transform Selection) fold over itself. Otherwise perfect!
Hope this helps somebody else!
ACraigL