Forums / Cotonti / Support / Randomizing Image

ok so GOM Team use to have this http://custom.simplemachines.org/mods/index.php?mod=909 it randomizes the images {Random} Image 1 | Image 2 | Image 3 {/random} ({} = [])

but i didnt add it to the LDU another guy did, im wondering how i would added it to the Sed files (cotonti)