Check out this photo tutorial on how to set up a glass tank. It also has links to thermometer and thermostats.
http://ball-pythons.net/forums/showthread.php?t=201740
Besides a UTH, I'd invest in a ceramic heat bulb. They're a little bit more expensive but they just produce heat without light. BPs do fine with natual day light (for which they usually hide anyways) and red/black light at night bothers them.
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