  Using evolutionary population synthesis, we present integrated spectral
energy distributions and absorption-line indices defined by the Lick
Observatory image dissector scanner (referred to as Lick/IDS) system, for an
extensive set of instantaneous burst single stellar populations (SSPs). The
ages of the SSPs are in the range 1-19 Gyr and the metallicities [Fe/H] are in
the range -2.3 - 0.2. Our models use the rapid single stellar evolution
algorithm of Hurley, Pols and Tout for the stellar evolutionary tracks, the
empirical and semi-empirical calibrated BaSeL-2.0 model of Lejeune, Cuisinier
and Buser for the library of stellar spectra and the empirical fitting
functions of Worthey, Faber, Gonzalez and Burstein for the Lick/IDS spectral
absorption-feature indices.
  Applying our synthetic Lick/IDS absorption-line indices to the merit
function, we obtain the age and the metallicity of the central region of M32,
which can be well explained by an instantaneous SSP with an age of 6.5 Gyr and
a metallicity similar to solar. Applying the derived age and the metallicity
from the merit function to a number of index-index diagrams, we find that the
plots of Hbeta-Fe5015 and Hbeta-Fe5782 are the best index-index diagrams from
which we can directly obtain reasonable age and metallicity.
