USBLoaderGX doesn't work with sneek/uneek/neek2o.
This loader use his own emuNAND method (nand loader, using cIOS to redirect NAND access).
If you want a very quick guide:
- install d2x cIOS (v8 or newer)
- install USBLoaderGX (1231 or newer)
- copy wad files you want to install later on emuNAND to SD:/wad/
- Launch USBLoaderGX
- Click on 4th icon at the top and enable emuNAND channels
- Go to settings > features > Dump NAND > Full, and dump all the NAND to your SD:/nand/ folder (it's the default path)
- Go to Settings > Features > Wad installer, select the wad to install (one by one, hit install).
- Go to main menu, launch the game you want