Nooo I typed up a reply but wasn't logged in, haha...
Just to clarify, my goal is not to make one 32x96 sprite, but to have 3 32x32 sprites on one .bmp like the tic-tac-toe tutorial. (E.g. X, O, and blank)
Then use nf spriteframe to change the frames. :)
I probably didn't explain that well...