After some noob discussion over at "gbafail", and after I made my own observations, I came to the conclusion that the parsing of bootmii.ini might a little bit buggy - but before I explain the possible bug, I must add that BootMii is a very fine piece of homebrew software, and the bug I might have found is merely an annoyance, nothing really severe. From testing, I have deduced that Windows-stby Helsionium - BootMii Beta