Although Microsoft Vista (aka Longhorn client) is at least a year away from release, there are already sites to help you tweak Vista. TweakVista.com has hints and tips to help you tweak Vista. Of course, many of these are tweaks are not supported. But given how poorly the current version sof Vista run on my hardware, unsupported tweaks that get Vista working are most welcome.
The Tweakvista softare is donloadable from: http://www.tweakvista.com/TweakVistaSoftware/TweakVista-0.6.zip