The CAppearanceDef links Actions to anims. If an Action doesn't exist you simply can't do it.
There's an editor for it here ->
Fable: The Lost Chapters Mod Scene: Tools => Miscellaneous Applications
Open the Player's CAppearanceDef and Thunder's and make note of the missing actions. (There will be alot!).
Export from Player, Create into Thunder. Change anim ID's where needed.