I Don't think I took any pictures of the incubator with the eggs in it... If I have time, I can stage it and take a pic.. but honestly, it's really simple...
The 'plastic jar' I mentioned was a large animal crackers container... like this
http://www.amazon.com/Stauffers-Orig.../dp/B001NC8HS6
I filled it with water, and I set it inside the cooler,
http://www.camping-tips.com/images/page/cooler.gif and set it toward one side.
I put a submersible aquarium heater (not sure the other kind is even made anymore)
http://img.dxcdn.com/productimages/sku_131295_1.jpg in the water,
Along with a floating thermometer
http://www.petguys.com/-030172371010...FRYcaQod2LUAkA
The smallest heater you can get will work just fine - you are heating less than 2 gallons of water in the jar
You can also substitute some other container to hold the water, but it should be tall to lessen the chance of a hatchling somehow getting into it (mine never left the gladware tote. A gallon sized pickle jar would probably work, though it is a little smaller. I just happened to have the empty cookie tote.
Set the heater to the temp you want, let it get the water up to temperature - and confirm the temperature with the aquarium thermometer.. It's a good idea to set a second thermometer on the far side of the cooler, to see what the temperatures are where the eggs are. And adjust the heater as needed so the second thermometer shows the temp you want the eggs at.
I just gently closed the lid of the cooler on the cord for the heater, but if you are really worried, you could cut a notch in the lid or rim for the cord to sit in.
Nancy