It is an animations mod so no damage values have been changed.
Depends on what type/version of OJP you are using. Most versions have animation tweaks so they won't be compatible with this mod.
FYI: animation mods don't stack together.
Last version of Dragon was 0.9.2. Nothing other than what is included is needed. It comes with Dragon (for making animations) and glaMerge (for combing the new animations with the old JA animations).
Download link: http://www.filefront.com/17834477/Dragon_0.9.2.zip
If you want some backhand animations here are some I made a while back: