Go here and scroll down a little. The Boa Constrictor Manual is a great book. It will teach you all you need to know.
http://www.beanfarm.com/store/agora.cgi?cart_id=4052744.13162*ZW6uQ0&product=Books&user4=Snakes

This is your best bet as far as heating (hot spot)
Use a wood bottom on your cage, with linoleum glued to it, or use a melamine bottom, something that is water proof. The plastic is way to expensive. The Flexwat will heat through it no problem. For a 4' x 2' cage, a couple feet of the 11" would be good.
http://www.beanfarm.com/store/agora.cgi?cart_id=4052744.13162*wb1o50&product=Heating&user4=Flexwatt

These panels work well in combination with the flexwatt, to get the ambient temps up in your cage.
http://www.beanfarm.com/store/agora.cgi?cart_id=4052744.13162*_67Vk3&product=Heating&user4=Heat Panels

This is a great way to control the temps (Flexwat) in your cage. However, a dimmer switch will work fine for someone on a budget.
http://www.beanfarm.com/store/agora.cgi?cart_id=4052744.13162*yo1QJ8&product=Temperature Control&user4=Herpstat Proportional

Here is a cage building discusion forum with a lot of good information.
http://cagemakers.ophidiagems.com/

Good luck, and welcome back!
-----
Jason Dowell

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