Hasta La Motion!

In AE I can use the displacement map effect under the distort menu and use my own B&W displacement map to create a cool effect. I can just use this effect in AE for this shot, but I would rather learn how to do it in Nuke and just tweak it in there because my comp is built there. It isn’t that much of a hassle to just do the effect in AE, on the tracked plates that I get out of Nuke. But, I just want to learn! What I am achieving in AE is the effect of warping from a plastic screen being in the foreground of a shot with a nodal pan. I am pretty new to Nuke by the way, so any help would be greatly appreciated. Thanks!