Hi Ray, yes like Burr writes above the command reference gives some information about each individual command.

Information on Variable radius fillets is in the Fillet topic here: http://moi3d.com/3.0/docs/moi_command_reference7.htm#fillet

Auto boolean is described at the end of the Extrude topic here: http://moi3d.com/3.0/docs/moi_command_reference7.htm#extrude

If you are having problems with a particular model, if you can post the 3DM model file with your objects in it, that would help to give you some more specific advice.

- Michael