Probably the easiest way to do this would be to use a global variable.
What you need to do is simply set the status window to active and the command window to not active.
I would suggest making some kind of global variable and putting it at the list of them in scene_title, name it $menu_setting = 0, or something similar, after that you would put an if statement in the main section of scene_menu (under the commands to create the windows) which would look something like..
if $menu_setting == 1
# Make status window active
@command_window.active = false
@command_window.index = 3
@status_window.active = true
@status_window.index = 0
$menu_setting = 0
end
This would make the status window active whenever the variable is set to 1, so all you would do is make an input event in scene_map that set the variable to $menu_setting = 1 and then $scene = Scene_Menu.new below it.
You can do the same for the other menus essencially, with different settings.
Note: The @command_window.index sets the cursor to status, otherwise its on items, not a crucial thing but it makes it look better. =P
Hope this helps. If you don't get it i can probably explain more or provide some code.