How do I extract an object from its background in photoshop cs 4? How do I change to a custom color in gradient? 242maryrich
There are many, many tutorials you can Google.
This is an involved process that can take many different routes, and each of those ways of achieving the same goal in isolation requires sound Photoshop skills and instructions that far exceed the scope of the forum.
Look at this tutorial http://tv.adobe.com/watch/the-russell-brown-show/masking-basics-in-pho toshop-cs5/