well unfortunately you don't have Bootmii as Boot2 so it sounds like it has to go to Ninty after all, but the good news may be that they will give you an older refurbished version that u can install bootmii onto as Boot2.
And yes u need a GC for bootmii. unless its installed as Boot2 and u can use the power and reset buttons to move between the options.
ill send it away then, cheers for your time. I need to make sure i don't brick the new one they will send me haha