Mass change a portion of a file name? I have a whole bunch of files named as following (example):

ADVANTE  18''8.0 PCD5'114.3 ET45 CB73.1.jpg
ADVANTE  18x8.0 PCD6139.7 ET20 CB110.2.jpg
ADVANTE 'A MI576B 20''8.5 PCD6'139.7 ET25 CB110.2 GBXZLDCP.jpg
ADVANTE 'A SH10 15''6.5 PCD8'100-114.3 ET40 CB73.1 3FPBU.jpg


How do I go to each file and change a portion of their filename to:

ADVANTI  18''8.0 PCD5'114.3 ET45 CB73.1.jpg
ADVANTI  18x8.0 PCD6139.7 ET20 CB110.2.jpg
ADVANTI 'A MI576B 20''8.5 PCD6'139.7 ET25 CB110.2 GBXZLDCP.jpg
ADVANTI 'A SH10 15''6.5 PCD8'100-114.3 ET40 CB73.1 3FPBU.jpg


using some sort of command or app? It would take too long to rename each and every one of them manually.
If you use the ZSH shell, this can be done easily in Terminal with zmv (included with OS X by default). Why use fancy scripts if the work is already done?

Type zsh in a terminal window if for some crazy reason you do not have it set as your default shell.

autoload zmv
zmv 'ADVANTE(*)' 'ADVANTI$1'