Success!
well for cfg USB Loader. The installation process of bootmii I have followed seems to have installed a forwarder because I have the cfg usb loader channel. After reading a lot about the boot process and all (very interesting) I simply copied my apps/ and usb-loader/ folders to my usb hdd, edited the usb-loader/config.txt to save the covers to usb instead of sd.. and voila. I just tried it. No sd card inserted, I started the usb loader and had access to all my games stored on my hdd.
So, for this thread, if you are only using homebrew to install usb loader to backup your games and play them without the cd switching, the sdcardless way works.
Now, since I'm geek deep inside my guts, I'm gonna keep reading and see if I can get homebrew and bootmii to load from the usb hdd. I read that if cfg usb loader doesnt find the config file on the sd card, it loads the usb hdd and look for the file there, so thats why it's working. But for homebrew and bootmii, I dont know.
Medi
p.s.: My son and my nephew are curently playing with the wii (and the console belongs to them hehe) so I cant test right now (or very little testing) I don't really play with the wii and the bootmii was to keep my 5yo son to play with the cds and scratch them =) But coding is what my fun is so that is why I wanna keep reading and learning about how everything work with bootmii and homebrew.