I don't use PEP v2 myself, but checked quickly to confirm. Not sure what you're doing wrong, but I can't replicate your issue. Per PEP v2 simply access the "System\FirmKey Properties\Appearance" tab. Select the released state, then press the "Add Image" button. Once adding the image select the "Use Original Size" button, then repositioning the firmkey accordingly. Make sure to add the appropriate image for the pressed state as well of course.