Software for superposition of similar molecules/domains

[Rick Faber]

Anyone know of a 'automated' way of doing superpositions of different 
molecules other than using O?  I'd just like to save a little of the
drugery of figuring which C-alphas should correspond to which in 
several different domains/molecules.  Someone must have written code to 
do this somewhere.....  Any hints would be appreciated.

cheers,
Rick

R.Faber at massey.ac.NZ