Moises,
Just to be clear, whilst this may work, modifying any of the stock handlers other than customization points (Handlers whose name begins with the word "Custom") is a big no-no and could result in your system no longer being supportable.
In addition, you run the risk of future updates to your system either breaking your customization, or not working.
I suggest you see if there is a Customization point available within that handler. If not, contact Support and request one be added.
HTH