Hmmm, I'm not sure what those maps are, but I'll try googling to find out.
But playing around a lot more, I did find the undersscore and the arrow key combinations.
Fn + H + numlock = underline
Fn + . = up arrow
Fn + [ = left arrow
Fn + ] = down arrow
Fn + \ = right arrow
But thanks, will look for those maps. sdjf