scMirrorBlend.mel how to mirror blendShape !

Its been a month since i updated in here, i been working on few automation process for my rig setup.
i did almost six month ago. Well we do have some excellent scripts written by brendan ross
(a real hard working guy!)named abSymMesh but math behind both the scripts is different.
This proc came out as idea thrown out in cgTalk community.
Do let me know if you face any problem! Just a note script will itself duplicate the mesh and mirror shape.
I tried to catch things and did a mel script. Its a trick based on wrap deformer to mirror the one sided blend to other side.
You really become rusty if you leave something for long. so just to groove in i am posting one of my script
do modify closest distance in script if you need some adjustment .

ScMirrorBlend

scMirrorBlend.mel