Check out these photo editing free images:
Llangyfelach Cross Stone ghosts
Image by Mike's...Seat related tales
And here I Imported the original print as a layer on my shot then edited properties to merge using the multiply feature. It's not bad is it?
You see I can get the scale right on the cross stone or the headstone but not both due to positioning and so on.
My first attempt using Paint.net free photo tool on windows Vista.