Ive been searching and found something for burning crusade lovers.The model of WOD can be found on site modcraft these are created by Leeviathan and legion NPC and mounts are created by Bamby.
download them and put them in you directory\data folder for example C or D:\world of warcraft - The burning crusade\data
All files are like
patch-3.MPQ
patch-4.MPQ
patch-m.MPQ
you change them like
patch-3.MPQ
patch-4.MPQ
patch-5.MPQ
but dont give them same number like
patch-3.MPQ
patch-4.MPQ
patch-4.MPQ
you can also put alphabets like
patch-b.MPQ
patch-n.MPQ
patch-m.MPQ
but remember not same alphabets
I dont know about other servers but its allowed in warmane im currently using it for almost 2 months talking about NPC and mount models the character models just came so i downloaded it few days ago the thing is its not banned by warmane and im great full for that.
if you face bug and problems pls dont post it here go to creater modcraft page.
if you want to remove the models and NPC back to normal just remove the patch files you added in data folder.