I decided to contact the people who make the Viper alarms, to ask if one could be added to my #9 without requiring that I use the Viper's fob.
I think that the alarm should be able to notice my dome light come on with the door closed and guess that it should start to stand down and not go off when I open the door. Same deal for a remote opening with the Prius' fob. Until I hear back from them, it's just something I think...