subsix on "Where to put printCustomMenu() in the file ???"

Hello,

I just install with success ZenPHOTO
I have create a Menu with Menu Manager called Menu1
I use the Default Theme

In the Menu Manager, i see " if u want add your menu, just add the printCustomMenu() argument on your page " ok, but where i need to put this code ? what kind of file ? where in te file ?

Thx for your help