Yes, as with any modification, even an intake, it's a good idea to know what you're doing, as you're changing the way the motor works.
Building the turbo kit itself isn't the difficult part, especially when you have a grocery list, like on the homemade turbo site. After that, it's getting all the tubing bent and fitted, the custom parts made, and finding a fuel management system that will suit your needs.
Then comes the fun part, tuning! You're going to spend countless hours on a dyno to make sure you get things correct, and to make sure you don't prematurely detonate.
Anyways, you're off to a good start with the turbo itself.....Enjoy the next steps and keep us updated! Though, please do as ctruss says, get a book or two, or even jump onto howstuffworks and you'll at least get a better understanding of what's happening!