Short how-to tutorial for making our Pocket PC's looks like Diamond:
1. Deactivate HTC Home (Settings/Today/Items)
2. Copy all files to /Windows
3. Active HTC Home
4. Copy Diamond_v2.0.tsk to /Windows
5. Apply theme file (Settings/Today/Appearance)
You can use other clock faces from different diamond skins if you don't like this one.
And you can make a HHC pack if you want to.
* HTC Home is not included in the package
Thanks to empex!
And now, all ringtones from HTC Touch Diamond ROM: