Feel free to use my stock anywhere!
If on DA, just leave credit in the description area.
If off site, have it somewhere on the picture.
If you want to send me a link, I'd love to see it, but no need too.
However, you actually need to edit the pictures for manipulations. Do not just add some colour layers over it. Edit the image you want out of the picture and put it into a new background.
*I have since added some pictures that can be used for photo blends. Read the descriptions. I will only allow those for blends.*