I'll try to make my instructions easy to scan, but also as specific as possible. Where appropriate, I'll include pictures that illustrate the steps. Here's an example of format I might use for an instruction page:

How to Change a Tire

Step 1: Pry off the wheel cover with the wrench and loosen the wheel nuts.

Step 2: Put the jack under the car.

Step 3: Use the wrench to jack the car until the wheel is about three inches off the ground.

Step 4: Remove the nuts, mount the spare, and thread the nuts back on by hand.

Step 5: Lower the car, remove the jack, and then use the wrench to fully tighten the wheel nuts.

***!!! WARNING !!!***
SOAP BOX RACING IS INHERENTLY DANGEROUS
AND MAY RESULT IN BODILY INJURY OR DEATH.
DO NOT ENTER UNLESS YOU UNDERSTAND THAT.
Like: downhill cycling, mountain biking, skiing, skateboarding, snowboarding, bmx, rollerblading, and other extreme and non-extreme activities. Soap box racing is dangerous, cars can reach upward of 50+ m.p.h.. Soapbox events are held on public roads and variable conditions always exist. The fact that your soapbox car will have, steering, brakes, and maybe a roll cage and seat belts should not imply that this activity is safe in anyway. Soapbox karts should obey all traffic rules to the same effect as a bicyclist, skateboarder, wheelchair or any other NON-motorized activity that may occupy the roadway.