TweakGuides has for a long time been offering extensive and detailed tweaking guides for games and applications. It has now announced that it has made its greatest update for a very long time as it has launched a complete tweaking guide for Microsoft’s new operating system Windows Vista. The guide has taken hundreds of man-hours to complete and we have no reason to doubt this as they walk you through practically everything you need to know with such an advanced operating system as Windows Vista. Everything from installation tips to performance tweaks can be found in this 250 pages long guide. Those who wants to really dig into Windows Vista and learn a little more about it should really take a look at this guide.