Ok now i will present window 7 boot changer
Features:
Modifies the boot animation
Modifies the boot text "Starting Windows" and "
Microsoft Corporation"
Will compile the animation from 105 BMP, PNG, GIF, or TIFF images
Does not require any other applications (like ImageX)
Designed to be idiot-proof by having numerous checks
Automatically backs up the modified winload.exe and bootres.dll
Can be run as a GUI or command-line program
Works for 32-bit or 64-bit Windows 7
Numerous other little things (e.g. forcing timestamps) to match the original
here i will direct u guyz to the developer source of this project..enjoy..its very easy yet powerfull enjoy guyz!!
[You must be registered and logged in to see this link.]Enjoy guyz
Subject: Windows 7 Boot Screen Changer 
Mon May 30, 2011 5:02 pm