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There’s still a long way to go before Vista comes out as a standalone product or come pre installed in new PCs, until then you can use Vista Transformation to emulate Vista’s new user interface on Windows XP. This packs offers all the goodies like Transparent borders for Windows, Icons, Bootscreens, Logon Screens along with a skin pretty similar to one seen on Vista.
From what I read on other blogs, they say that its quite hard to uninstall VTP and revert your PC back to its original state. VTP RC1 is just a test version, so handle with care 
VTP has been out for quite a while now, I was planning to write about it here earlier, but due to my lazy schedule, I couldn’t. When it comes to user interface, KDE rocks!, but who cares for Linux?
Download Vista Transformation Pack 6 RC1
You can also try Brajeshwar’s Vista Wallpaper Pack to give it a change.
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wrote, on November 27th, 2006
Looks nice. There’s also a theme for Vista, I don’t know whether it’s the same as the VTP but you can have a look at this goodieee if you want.
I think for the one I have, you’ll only have to delete the respective theme files and it’s all gone.
wrote, on November 27th, 2006
Hey I do care for gnu/linux! I use it for almost all of my day to day usage. What about you do you use gnu/linux? On you mention of KDE being a better choice as DE i agree, but I somehow like Gnome.
wrote, on November 27th, 2006
I’m gonna pass this up. I prefer my computer tuned for performance. Any styles just slow it down …
wrote, on November 27th, 2006
Hans: The link gives me a 404 error.
Ajay: I’d agree with you on this regard, but sometimes* I prefer eye candy looks
*not always
wrote, on November 27th, 2006
oooops, I forgot I changed the Timestamp when I updated the post for some new goodies. Here’s the link.
wrote, on November 28th, 2006
That looks quite nice, but they should definitely streamline the process to install/uninstall, since it would be a great opportunity to try it without risking having to keep it forever or to have to deal with a messy uninstallation.
wrote, on October 6th, 2007
idk like this cuz it has too much error
wrote, on July 17th, 2008
When I Click It It Has A Vista BackGround But Not Installing
When I Restart It Says Checking Disk And Still XP