That's one question I can't answer, because I don't know AutoRealm.
Yes.
Yes.
If I understand how you mean that right, yes.
The 1" hex scale is OK, but as to overlaying squares: Maybe not. I never tried it.
Again, if I understand what you want correctly, yes.
In addition to the free trial version that Joe Frazier mentioned, you also can download the 160-page PDF manual/tutorial free at:
http://www.nbos.com/nox/index.php?action=1001&id=125
The manual thoroughly covers everything but raster mapping (only introduced). Later this week we'll be releasing a free, open, 200+ page PDF tutorial on raster mappiing with FM8.