HFSS and mixed-mode s-parameters

Hi, is there a way for HFSS to directly plot mixed-mode s-parameters? If not, does anyone have a good guide, or equation, for a generalized conversion between single ended and mixed mode results? I'm currently simulating an 8-port network, so equations from 4-port network conversion (which are everywhere on the internet) are not so useful. Any help would be appreciated.