UnZip the files. There should be eight JPEG images.
Print all eight images as large as possible - each one on a separate
page in 'landscape' mode.
Snip off the borders with scissors and tape them together along their
edges and you should have something that looks like this:
Using the Graph Racers rules, start at the storm drain outflow in the
top left corner and race through the streets of LA, down the spillway,
through the industrial district, along the freeway and into the railroad
car in the freight yards at Union Station. The first car to reach the
purple dot wins!