Hello Everyone, This is my 1st post here so excuse me for my ignorance specifically if the questions I am bringing up have already been answered or are already common knowledge. First off, I've few friends already engaged in this and they've been at it for some years now. They've introduced the idea & have just been recipient of their OS CDs which have been most updated when I receive one. Aside from being most updated, their Windows installation discs have been customized & a recipient like me (& some other friends) can't ask for more & just wait whenever they have new OS discs to give away. To make things a little competitive, 1 would claim that his OS disc's better than the other. I've always been content to just sit & wait when their updated OS gets burned ready to install without any user intervention (aside from putting my CD key) until I figured maybe I could dig my hands into it too. I've been asking them some questions & true enough they've been generous to share some of what they know. But I'm certain it'll be a great pay-off to join forums & ask other folks who've been doing it too for quite sometime now & maybe find consolation that there are others out there who'd like to "learn the ropes" just like me. Moreover, this might serve as answers to newbie questions that maybe others would like to ask but are embarrassed to to do, much more admit not to really know about the topics being discussed. Lastly, this will be something that I can always refer too as an online document for I know along the way I will get confused. Now to get the ball rolling, I've chosen to post here because this seems to be the most relevant forum to address my ignorance, or for lack of better understanding. I've tried searching the web, but I can't find anything direct & clear enough to make me truly understand these concepts in its most basic sense. Most that I've found were downloads. I'm confused about the similarities & differences of the following terms: Addons vs. True Addons vs. SVCPACK Addons vs. Switchless/Silent Installers vs. Update Packs How do I distinguish 1 from another? Is there such a thing as not being a true addon? Updating vs. Slipstreaming vs. Integrating Please describe & differentiate them. Are hotfixes & updates from Microsoft better slipstreamed or integrated? I'm sorry if I might have mixed these all up. I'll stop here for now. I think this will be a good take-off point for me but for sure I'll be back with more supplemental questions. I'm hoping you guys help clarify these stuff to me. Thank you very much.