I wrote up a guide a few posts back. Check it out and see if it works for you.I looked in the OP and did a search but what exactly do I need to get NEEK set up? Just build the kernel from ModMii? I'm tired of Flowerworks crashing in the middle of a game.
https://gbatemp.net/threads/usb-loader-gx.149922/page-1075#post-5929568
However I'm not sure if ModMii will automatically download the needed files anymore. I think Google Code has shut down by now which ModMii relies on to get the files.