So you want to make a button that looks exactly like your original button. Why when you already have it? Wouldn't you want to make buttons that you don't have...new buttons? [shrug]
Anyways, these are super simple. Most of them are nothing but the Layer Styles effects.
For example, the black button is simply a layer of solid black:
Then I used the Rounded Rectangle Tool to create a Layer Mask in the shape of the button:
After that, it's all Layer Styles that take us to this:
If you use the same Layer Styles and duplicate these settings for each one you should end up with the exact same effects.
Here's the main Layer Styles dialog box:
Here's the Drop Shadow dialog box:
The Outter Glow dialog box:
The Bevel & Emboss dialog box:
And the Stroke dialog box:
As a final step I added a 2nd layer that is nothing but a very light, very translucent, light gray smudge that kinda smears down the right portion of the button face and then along the lower portion of the face. This was just to add some false detail to the button face (although it'll barely be noticable at the button's small size).