How To Change Boot Screen For Windows 7

The first thing to do is download this Win7BootUpdater. With this program, we can easily modify the Windows 7 boot screen animation and text. The animation is created using 105 images in BMP, PNG, GIF, or TIFF formats. The frame rate can be changed.
This is only a beta and the developer itself has said that it will mess up some computers. So, be careful using it.

Download windows 7 bootskin here.....
After you downloaded it, you extract the file.
To change the bootscreen, go to File>Load boot skin>open your downloaded bootskin.