Trackpad through wood

Hi guys,
I bought the Capacitive Touch Kit for Arduino and since it comes with a grid touch pad, I imagine if would be possible to make this sensor works like a notebook trackpad, returning X and Y coordinates to control a mouse cursor.
My great challenge is that I need to make a trackpad that works through 6mm of wood.
I know that is possible to make a single pad be activated through wood, due to capacitive field, but I really need more than a "trigger", I need position of the finger, just like a notebook trackpad. Is there anyway to achieve that?
Thank you in advance.
I bought the Capacitive Touch Kit for Arduino and since it comes with a grid touch pad, I imagine if would be possible to make this sensor works like a notebook trackpad, returning X and Y coordinates to control a mouse cursor.
My great challenge is that I need to make a trackpad that works through 6mm of wood.
I know that is possible to make a single pad be activated through wood, due to capacitive field, but I really need more than a "trigger", I need position of the finger, just like a notebook trackpad. Is there anyway to achieve that?
Thank you in advance.