Screen saver slide duration query

[snerkler]

Is there an easy way to change the screensaver slide duration, i.e. how long each image is displayed for, in Mountain Lion as I find the images do not display for long enough before it moves on to the next?

I've done some googling and all I've found is this, which is a bit over my head

http://wiki.daveking.com/index.php?...Duration_In_Screensaver_"Ken_Burns"_Slideshow