To run this theme on Windows XP (any Version) Use Windows Xp Vista Theme Patcher

AeroSquared BETA by ~Aazarah

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Installation
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If you’ve already hacked vista correctly and just want the theme skip to step 3.

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1) Patch UXtheme.dll file

Install Vista Glazz - [link]
(patches UXtheme.dll automatically)
**MUST reboot after patching**
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2) Desk.cpl hack (optional, but recommended)

Makes the name of the theme appear in the classic appearance properties listbox to help identify which theme is which, rather than a list of themes the just say “Windows Aero”
Navigate to ‘Step 3′ > ‘Working theme names’ > ‘App’ > ‘VistaDeskHack_1.1′
And then run ‘DeskHack_Install.cmd’
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3) Theme copy

Copy the ‘Aero? BETA’ folder directly into the C:\Windows\Resources\Themes
directory, if you WANT transperancy in the maximised window and taskbar.

OR

Copy the ‘Aero? nMT BETA’ Folder directly into the C:\Windows\Resources\Themes
directory, if you DON’T WANT transperancy in the maximised window and taskbar.
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4) Apply the theme

Either:

Double click the ‘Aero? BETA.msstyles’ file
OR
Right-click the desktop > ‘Personalize’ > ‘Window Color and Appearance’
> ‘Open classic appearance properties for more color options’

And then select the theme from the listbox and click Apply/OK.

Download: AeroSquared BETA Vista Theme