Dark Valentine

Exactly what I want: 1:How to do things like this myself. 2:Where are the item, attack, and creation defenition files? I could only find some stuff that looked like AI scripts. If #1 is unavailable, with #2 I'll figure #1 out myself. Or, if all this fails, I would like, mainly, the creation modifications.

Is there any chance of me getting a copy of this?