@cyclegadget, I remember reading about a pen that contained conductive ink. If you can get one, and its good quality, you might be able to draw a line over the top of the resistors.
Or use a loop of wire over each resistor, some people fixed the SD card connection using this method.
If you have the resources, a little breakout that reconfigures the 40pin header to the LCD format would work, then you don't need the shield.