Well, so long as you looked. Geez, we were all new at this once. I've only been on Android for a little over a month but at least I took the time to learn and read. I feel like there are a lot folks coming in who are expecting everything to be fed to them with a spoon. I'm going to ask what everyone else asks, did you do a search for boot animation on the marketplace? Even searching for those terms comes up with a bunch of different changers including Boot Animation Changer pro (I forgot the word Changer, in the original post, but still didn't prevent me from finding this application in my list of search results):
http://androidapplications.com/78372...on-changer-pro
Self-education is the best way to go. Everyone here is going to fall all over themselves to help but not if we realize that none of that is being done by the people asking the questions. We're all learning too, but at least we're willing to search first.