I currently have DF set up to show randoms images on 2 different monitors, but sometimes I want to change to a different random image on one of the monitors and keep the random image on the other monitor, Is it possible to do this and if so how?

Do you mean just have one monitor displaying random images and the other displaying just one image?

No I want both monitors to cycle random images every 60 minutes, which I have set up correctly but there is the "Load Next Wallpaper Slideshow Image" button that can be added to the title bar to cycle the images at will,
but sometimes I get a image on one of the monitors that I want to keep but I want to change the image on the other monitor, is there a way to have DF change a image on one of the monitors at will without changing the images on both monitors