Ok, first off how cold does the room that your sake is going to be be in get? That will determine wether or not you need a heat lamp.
The heat pad (I will refer to it as a UTH) is in the correct spot. Do you have a thermostat for the UTH?
you will need 2 identical hides... one over the UTH and one on the cool side of the tank.
I prefer these hides (sold at reptile Basics http://www.reptilebasics.com/hide-boxes)
UTH's do not effect the temperature of the air in the tank so you will need a thermometer with a probe to monitor the temperature that it is (plus the thermometers sold at pet stores do not work anyway. I suggest that you get this, it costs $12 at Walmart and will measure the hot and cool side temperatures as well as humidity.
This is what a glass tank should look like (I was using a heat lamp instead of a UTH but either will work And I don't have a thermometer in the tank but that is required as well
Have you read through this? http://ball-pythons.net/forums/showt...s%29-Caresheet