Great, lets se if it works for me, I have two meshes with the same quantity of vertex, but when exported, one mesh lost or changed the name or order of the vertex, so I´ve couldnt copy or add shape keys to it from the other mesh, I hope this works!
this addon is not working in 2.70 version
flashing the error -
File “***********\oscurart_copy_vertex_location.py”, line 47, in printea
vertice.co=secondary.data.vertices[vertice.index].co
UnboundLocalError: local variable ‘secondary’ referenced before assignment
location: :-1