In order to change costumes (NOTE, will have to reconnect after changing):

1. Decide which costume you want.
2. Rename char.ini to something else.
3. Rename char (costumeyouwant).ini to char.ini
4. Rename "objection.wav" to something else.
5. Rename "AltObjection.wav" to "objection.wav"

And there you go! Next time you connect to a server as that character, they will have the alternate costume!