How to install theme without user picture in start menu:

1.Patch your system with Universal Theme Patcher (http://deepxw.blogspot.com/2008/11/universal-theme-patcher.html) and then copy theme files and corresponding folder from "Windows 8 Themes\Windows 8 RTM Default\Windows 8 Main Theme" folder to "C:\Windows\Resources\Themes" folder.
-Skip this whole step if you already have installed Windows 8 Main Theme.
2.Now you'll need to replace "aero" file present in "C:\Windows\Resources\Themes\Windows 8 RTM" folder with the new "aero" file present in the "Windows 8 Themes\Windows 8 RTM Default\Start Menu Without User Picture\Windows 8 Main Theme" folder.
-In case you already use Windows 8 Main Theme, you must first change theme to Windows 7 default and then log off or restart your computer. Now you can change "aero" file.
3.Apply from personalize or double click on the theme file.

Enjoy in theme!!!