yes i've bootmii in the root of my SD :
here's the .ini config :
# BootMii config file
# Video mode, possible settings:
# NTSC, PAL50, PAL60, PROGRESSIVE
VIDEO=PAL50
# Autoboot, possible settings:
# SYSMENU, HBC
#AUTOBOOT=SYSMENU
# Autoboot delay, in seconds:
# Default is 5
#BOOTDELAY=5
but...