  We report a theoretical analysis of intrinsic localized modes in a
quasi-one-dimensional charge-transfer-solid $[Pt(en)_2][Pt(en)_2
Cl_2](ClO_4)_4$(PtCl). We discuss strongly nonlinear features of resonant Raman
overtone scattering measurements on PtCl, arising from quantum intrinsic
localized (multiphonon) modes (ILMs) and ILM-plus-phonon states. We show, that
Raman scattering data displays clear signs of a non-thermalization of lattice
degrees-of-freedom, manifested in a nonequilibrium density of intrinsic
localized modes.
