add_radiobutton extra´s need help

[volumeregeling]

Hi,

first of all, am i the only one who find the help files for python and
tkinter difficult to understand ??

but my problem,

I am making a menu with cascaded radiobuttons 

menu
    option
           radiobutton1
           radiobutton2

something like the above.

I make these menus through
menu.add_radiobutton(label='Remote',command=Debug_remote)

Now i would like to have a default option selected on startup, how do
I do this. In the help files , i can+t really find what i am looking
for ?!


thanks, Thijs Volders