In [SPECTRAL.XSPEC.SRC]XSPEC.OPT add XANBIN:[LIB]LIBXSPEC_LFN/LI to the link list. Now:
SET DEF XANADU:[LOCAL.SPECTRAL.XSPEC.SRC.FUNCTIONS]
FORALL
LIBALL XANBIN:[LIB]LIBXSPEC_LFN
SET DEF XANADU:[SPECTRAL.XSPEC.SRC.MODEL]
MSETUP
ALIB ADDMOD XANBIN:[LIB]LIBXSPEC2
ALIB MULMOD XANBIN:[LIB]LIBXSPEC2
ALIB MIXMOD XANBIN:[LIB]LIBXSPEC2
REN MODEL_*.* XANADU:[SPECTRAL.XSPEC.MANAGER]
SET DEF [-]
XFOR XSPEC
LNK XSPEC
XSTALL XSPEC