Whenever I installed Vista Ultimate, one of the programs I would always install soon after was Stardock's DeskScapes, which is sort-of like DreamScene on steroids. Well, one of the 'feature points' of the new preview version of 2.0 of DeskScapes is support for non-Ultimate Vista installs.
If you want to .DREAM-enable your Vista, check out the download page
here.
Now I just need to figure out how to convert a few of my .MPG files into the .DREAM format so that I can use my DreamScene video collection under Server 2008.