first of all, to install these themes you will need the Diamond TF3D config application. Once you have installed you can install the theme of your choice. The first one is called "Zitoun DirtyPaper v0.2"; the second one (with the faces) is called "TheBlacy Djoub". you can google them and they will be a theme file that you can save into your phone and then use the Diamond TF3D application to run it. The third one is called "FuzeBerry" and I found it as a .CAB, so you can actually run it straight from the phone.
They work the same way the default sprint theme does. u basically are just changing the appearance of the touchflo. I like them and I deiced to stay with the "FuzeBerry. I just love the way it looks.