If you don't want to install windows 7,but want to your Xp/vista look like 7.Hot to do it.Please try the way.
1.Windows 7 Style For Vista
First,download the RAR file of Windows 7 Style for Vista theme from here.
You can use a RAR extractor, such as WinRAR,to open the file ,then extracte it to Windows 7
2.TuneUp Utilities 2009
Try TuneUp Utilities 2009 free now!It can apply the theme to your desktop.Download it from here,
Then install and open it.click Customize Windows in the menu --> Visual Style\Add.And choose "
Install visual style from file". open the Windows 7 folder,then ope the Windows 7 style file.click
Apply in the main window completely.
Now your Taskbar will look like windows 7 now.It becames transparent.
We succeed in making vista taskbar look and feel like windows 7.