Dear All, I am looking for a program that: 1- Would work under UNIX (in particular Linux & Irix), 2- Could be ran using scripts i.e. in a non-graphical way, 3- Would allow to (i) load a structure, (ii) modify/control its orientation (axis x, y, and z), and (iii) save the new Cartesian coordinate set defined by the new orientation, and if possible 4- would be freely distributed for all users... Thanks, Regards, Francois