I think the easy way to find out your coordinates is to drive to the address or, using planning mode, centre the map on the address.
Then just hit the add speed camera button ( arrow on the left ) and it will pop up a window with the coordinates.
To cancel the speed camera, just hit the home button ( arrow on the right ).
Then, exit Map Monkey and enter the configuration screen. There, on the “other” tab, enter the coordinates. You can verify the coordinates by clicking the “Check Address” Button ( Arrow ).
And that’s it. From now on, whenever you need directions home, just hit “Menu”, “Destination” and “Go Home” ( Arrow ) .
Please correct me if there is a better or easier way to do this.