Treasure*Hunters

I am trying to set up my GSAK software. I have entered several residences as waypoints, family homes, etc. and want to use the house icon in the type field. But GSAK lists only about a dozen of different types, all having to do with different types of caches. How do I set up other icons, i.e. house, park, airport, etc.? There does appear to a way to do it, and I have fiddled around with it but with no luck.