The presented protocol enables the calculation of electronic states of aggregates using the full spectrum of multiconfigurational methods available in OpenMolcas, e.g., RASSCF or multistate RASPT2, through the use of the general state-interaction (RASSI) framework. The coupling between monomers is computed directly avoiding any sort of diabatization procedure that would require supermolecular calculations. Such a supermolecular calculation may become exceedingly computationally demanding for multiconfigurational methods as the active space has to be doubled when computing pairwise interactions between monomers. The here presented method is suitable for studying systems possessing wavefunctions of notable multiconfigurational character and systems where double excitations play a significant role.