  A LiBeB evolution model including Galactic Cosmic Ray nucleosynthesis, the
$\nu$-process, novae, AGB and C-stars is presented. We have included Galactic
Cosmic Ray Nucleosynthesis (GCRN) in a complete Chemical Evolution Model that
takes into account 76 stable isotopes from hydrogen to zinc. Any successful
LiBeB evolution model should also be compatible with other observational
constraints like the age-metallicity relation, the G-dwarf distribution or the
evolution of other elements. At the same time, we have checked how different
would be a model that took into account the last observations by Wakker et al.
(1999) of metal-enriched clouds falling onto the disk, from a primordial infall
model.
