NEED HELP external reset button in gsm900

Hello to everyone.
I am not sure if this is the correct forum to ask.
I want to use an external reset button for SIM900 Quad Band GSM GPRS Shield Development Board For Arduino instead the button tha allready have this shild.
It is possible"?
IF IT IS HOW I CAN DO IT ?

Thanks a lot for every help

Yes, it is.

and how ?

Solder it in parallel to the existing reset button.

THANK YOU VERY MUCH.