Tried polar co-ordinates under distort on your filter menu?  It picks the top as the centre normally and compresses that whole upper edge into a dot and wraps the rest of the photo around it.  Interesting effects can be made with it.  Not really sure what you are asking to be honest...

"In every colour, there's the light.
In every stone sleeps a crystal.
Remember the Shaman, when he used to say:
Man is the dream of the Dolphin"

Rich Meadows Photography