Hi!
First time in this forum and need help.
Been using PhotoShop since version 3 and despite thinking i have been pretty proficient in it, I feel real stupid asking this but I don't remember how I did it and desperation drove me here.
I am now using version 7.
I need to create a figure in a pool and need to create receding ring ripples in the water around the figure in the pool . I have looked through all the darn filters and all the tools i could think of and even tried looking through the various "PhoroShop WOW!" books I have collected through the years for some hint how this done and have pulled a bigger blank from those resources that I have from my aging brain!

Can someone...ANYONE...PLEASE....direct me to the correct filter or procedure or plug-in if there is one, that will allow me to do this?
As I said I did do it once years ago with an earlier version of the app but for the life of me do not remember how the frell it was done!  :( 
Thanks in advance for any help!