There is no manual that I know of. I just got a piece of paper from Paul and it had a description of the pedal and nothing too specific about instructions per se. I can scan it tonight and post it tomorrow, unless someone has already made a pdf copy of it.
Volume - Turn it up and it gets louder
Bass - Turning the knob clockwise removes bass
Treble - Turning the knob clockwise removes treble
Gain - Turning it up increases the gain
Mini switch - Clipping modes. Just use what is best to your ears. The differences are small.
On the back:
Tone - Changes the tone of the boost
Gain - How much gain does the boost have