Apart from multi-player games, which this is not, Game Courier can be used for any Chess variant Zillions-of-Games can be used for. So, if it can't be played on Game Courier, it can't be played on Zillions-of-Games. However, it might be doable in Game Courier if you laid out the 24 faces on a 2D surface and labeled each one.
That 2D layout is actually a task to be done anyway, if only for people who don't want to set up a 3D structure (and, presumably, and the extra table space).
I suspect, though, that for GC I'd have to turn the Open Faces (NW/NE/SW/SE) 45 degrees.
It looks horribly confusing, but I'll see if I can make more sense of it tomorrow when it isn't so late.
It may help to consult the playspace picture, too. I might even add a picture of it from White's perspective, where the four cardinal and four semi-cardinal directions are laid out as they would appear on a map, and the High faces are directly above their Low counterparts.
That 2D layout is actually a task to be done anyway, if only for people who don't want to set up a 3D structure (and, presumably, and the extra table space).
I suspect, though, that for GC I'd have to turn the Open Faces (NW/NE/SW/SE) 45 degrees.
It may help to consult the playspace picture, too. I might even add a picture of it from White's perspective, where the four cardinal and four semi-cardinal directions are laid out as they would appear on a map, and the High faces are directly above their Low counterparts.