Not many people build smokehouses anymore since we can buy small smokers pretty cheaply but monkeyman's Pig Butchering Tutorial made me think that it would be handy to have. I found the following link to an easy to construct smoker. http://www.kountrylife.com/articles/smkhse.htm
I've hear about using the regrigerator. I have an old one (circa 1950) and I thought I might try one this summer. I'll post photos if I try it.