Actually, I had looked into that mod, that and zelda sword skills. The main reason I didn't add it was because there are already so many keybinds from mods there literally was no more room to add more...
Yeah I had to do a bit of rearranging to get that fixed. One, you don't need the dragon flight speed to be different from the train speed. I also play solo so I changed the weapon switching to Tab, but that wouldn't work for SMP. You might be able to use 'Z' as the 2 things on it already are unknown to me. Otherwise, it is pretty cool, I am liking it. It also adds new arrows and the skellys actually spawn with them, such as the exploding arrows and the fire arrows. There are ender arrows also but I haven't been hit with one of those yet.