I'm always glad to answer questions, as long as its not stupid stuff....
anyways, dahl used inno setup to make his install, you can get it by searching google for it

, 100% free, its not a trial or anything, so you can use it for as long as you'd like. Inno setup lets you creat an install with the "Install Wizard" but a lot of features arent utilized like that, like automaticly finding the correct directory, launching a batch or program without asking, and things like that....
Just go download it, and if theres anything specific you want to do that the izard doesnt do for you, just ask me..