The best Packer is to STOP BEING FOOLISH and doing the easy way out and just do stuff the hard way.
Create an ARRAY of char, m[] = {'a', 'b', 't'}
char*
sprintf( , "%s%s%s", m[1], m[0], m[2])
that spells BAT
(this is hard and i can say most of you are lazy but this really does work