So it's like paladin_male_01.pmg is what you mean. Because it doesnt work when I do it.
For Paladins and Dark Knights, put it in Mabinogi/data/gfx/char/paladin/mesh/
For Paladins, rename it paladin_(insert gender)_(insert trans number)_bss.pmg
For Dark Knights, rename it darkknight_(insert gender)_(insert trans number)_bss.pmg
For Savage Beasts, put it in Mabinogi/data/gfx/char/giant/berserk/
For Savage Beasts, rename giant_(insert gender)_berserk(insert trans number).pmg
Although, the giant animations probably won't work with this...