on your sd card, in your bootmii folder, edith the bootmii.ini file
you can set the AUTOBOOT=SYSMENU so that it'll boot right to the normal wii
and you can set the BOOTDELAY=5 to however long you want a delay.
The delay gives you the menu, so you can select something if you want within the time period... and if you do nothing, it'll just load whatever you have set to AUTOBOOT.