Included in psico
This command or function is available from psico, which is a PyMOL extension.
extra_fit aligns multiple objects to a reference object. It can use any of PyMOL's pairwise alignment methods (align, super, cealign, fit...). More precisely it can use any function which takes arguments mobile and target, so it will for example also work with tmalign. Additional keyword arguments are passed to the used method, so you can for example adjust outlier cutoff or create an alignment object.
There are several similar commands/scripts for this job, like "A > align > all to this" from the PyMOL panel, the "alignto" command, align_all.py and super_all.py scripts from Robert Campbell.
This command has been integrated in PyMOL 1.7.2
extra_fit [ selection [, reference [, method ]]]
This will align 4 structures ..→