I found some stuff there, and I've gotten to the point where I can modify my keymap. I know this, because I've managed to unmap a key. However, I'm unable to map the keys to the actual output I desire. I need the codes for å, ä and ö, respectively. According to that I found, they're FUNC_8, 7 and 5, but that simply doesn't work. I get nothing when I push the buttons when they are pointed to those mappings.