custom go to question button in results

Is there a way to customize the 'Go to question' button image in the results window for a quiz and still have it link back to the question in the course? I have the 'Make link back to the original question' option checked in the test result properties window which puts the default button on the page(std_qt_Go_To_Question.gif). If i open that button's properties and try to import my own button image (the edit button is not available), it doesn't take it.And if i just try to add my own button (use Add Button) and set the on click properties to goto a specific question...it opens the question in the results pop-up window. I know I could force this to work with variables, but I don't want to do that.

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