Help with Moderation Analysis

Hi everyone,
Is it possible to run a moderation using Hayes' Process Macro when I have a predictor/IV that is NOMINAL (experiment Vs control). My moderator is scale and my outcome DV is also scale. I'm aware you can run an analysis with a dichotomous moderator but can't find anything on running it with a nominal predictor IV.
How would I interpret the output? I'm completely new to SPSS so just plain language please!
Thanks so much!