Have any of the published materials for RoleMaster included a sanity system? I'm considering running a low magic sword and sorcery campaign in a sort've Pangaean prehistory setting with a strong Lovecraftian feel (still debating whether to make it simply Lovecraftian or actually set it in Lovecraftian prehistory proper), and for that sort of thing I'd quite enjoy having a system to use for that sort of thing.