I may be able to help however I may be flying blind because I cannot see the image. I would try to use the Clone Stamp tool (Shortcut Key=S).

1.) Hold down the "Alt" key(Apple key on Mac) and pick a part of the backround that is as similar to what you want to take the place of the letters.

2.) Release the "Alt" key(Apple Key in Mac) and run your the cursor over the area you want modified. This will "Clone" what you picked in the first step.

If this still does not help, a am a Photoshop expert and can do it for you. Send the image to and I will be happy to help you.

Push them Pixles man!