XUbuntu Live CD customizing using uck-gui. - Splash screen not changing

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http://www.unix.com – Hi all, I am customizing the Xubuntu 12.04 live cd.. Using uck-gui , i extracted the iso file and mounted in a location. Can anyone please help me out how to proceed with removing the splash screen ( the screen that gives loading image with xubuntu logo) or to change the logo that is in the splash screen whatever is easier. Thanks Selva (HowTos)