My "Lazy Jack" setup

lazyjack-1.gif
The brown line is tied to the brown ring and runs through
a block on the spreader it is then cleated to the mast. The
red line runs through the brown ring and is tied to the red
ring. The green line runs through the red ring and is tied to
the green ring. The blue line runs through the green ring and
is tied to the boom. The black line is tied to the brown ring
and runs through the red and green rings and is secured to a
cleat at the mast along with the brown line

To hoist, pull down on the brown line
and secure it to a cleat at the mast

To lower, release the brown line and pull
in the black line and cleat it to the mast

Alternately:
The brown and black lines could be led back to the cockpit.

Adjust each line's length so that when
you lower the lazy jacks, all lines
will be pulled taught along the boom