If you don't have a DOF filter, here is how you can use your gradient :

1- Open your image and gradient side by side

2- Edit the gradient to make sure the range goes from black to white (using Adjustment -> Curves works best)

3- Copy your gradient

4- Set your color image to Mask mode

5- Paste your gradient into the color image. That will mask your image according to the gradient

6- Switch back to normal mode. Your mask / gradient will be transformed into a Selection

7- Go to Gaussian Blur and you should be all set

• agiel - www.linfa.net