i don't know how to explain what the fuse is, it's basically held in with 2 screws, one on each end. it's basically a really really thin piece of metal. (i think aluminum?)
it is in front of the fusebox, it has it's own little holder for it, it's plastic and you have to flip a lid open to see it.
the blower motor regulator is right by the blower motor, just follow the wires from the motor and you'll get right to it!

edit, thanks for the welcome there gilly.