I would like my Monster to start in an X of 6.5 instead of 6 or 7 for cosmetic reasons. I don't see that I am allowed to define the start in anything other than whole values. Is there an option I don't see?
There is no option for that. The monster placements are currenlty quite weird...
But you could try the modification suggested by FrankenGraphics : http://nesmakers.com/viewtopic.php?f=40&t=2568