I've just uploaded a small add on to the SpinDynamica website.
-The add on calculates dual-pairings between irreducible representations of S(n) and SO(3) < U(n)
-Irreducible representations of S(n) are identified with Young-Tableaux
-SO(3) irreducible representations are characterised by a total angular momentum quantum number.
Such identifications are useful for the determination of symmetry selection rules for long-lived spin operators.
The add on may be found under:
http://www.spindynamica.soton.ac.uk/about/addons/