i saw dr. julian johnson anim… and tried to find way to morf one head to another… and there’s no any tut here or else… so i have to find my own way… and i was suprised how easy setup is…
first of all… u know your disp maps must be from same base mesh…
whaen u create all your displacement maps you just make layer shader… and drag 'n drop 2 textures in shelf… snd delete defoult green node…
for blending u use OVER! and qith slider u can mix those 2 textures together!
just drop that layer texture to displacement node of your shader and there u go!! 
simple like that!!
or u can download avi file here
http://rapidshare.de/files/20634581/disp_morph.avi.html
and always u can make another layer shader… put your first layer shader on first position in new layer shjader and for secon texture u drop your third texture… and just like that u can morf from second to third disp map… and so one…
i hope u find this usefull!!!
c ya!
