Boot directly into Haiku with Bootman?

When installing bootman, the shortest time interval is 5 seconds before Haiku is booted by default. Is there any way to have this set to zero seconds and have Haiku boot imediatly?

BeOS used to have a command line tool called writembr which used to eliminate the boot menu and boot into the first partition. I cannot find the tool on Haiku, but there is a tool called makebootable which appears to do the same thing (warning - I haven’t tried it).