Boot Logos, Screens

How would I go about manually changing the boot screen? ie which folder is the file stored and would it just be a case of replacing the file?
I have heard about the splash.bin, but never seen it on my searches or travels
I thought it was more old school
Haven't tried splash.bin for a while as it stopped working at some point on the H. models. They might of fixed it now

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it was a nitemare for me too get the splash.bin to work on the H2 as all the what was normal methods wasnt working lol

Need to flaff a bit with photoshop see what ne logos can get