a question to save me a lot of trouble (editing sprite palette)

[SilverRegret]

for example, i want to frankensprite sprite A & B, i want to move A head part to replace B
hair color of sprite A palette is on number 4,5 and 6 on its palette set.
while sprite B number 4,5 and 6 palette is dress color (the head color is on 7, 8 and 9)
the manual (and really troublesome) way i do it now :
open sprite A on graphic gale, and replace A palette from sprite B (the sprite will look messy)
edit one by one bit those hair color (and often got me a miss >.<)
so anyone know is there any easier way to designate sprite?
(for example to direct all sprite A hair color from number 4, 5 and 6 to number 7, 8 & 9)
that would help me a lot for editing sprites..
thanks before..