Orbital optimization (e.a. Hartree-Fock method), their transformations (e.a. localization), integral evaluations, their transformation to the basis of active molecular orbitals and their storage on the formatted FCIDUMP 39 file were performed using OpenMolcas. The new excitation generation has been implemented in a locally modified version of NECI, 3 and will be made publicly available via our open-source repository 42 upon publication of this work.