H-Boot 0.35.0017 (this is not an engineering hboot)
H-Boot 0.33.2012 (engineering hboot)
Recoveries (Amon RA, Clockwork Mod and I believe there is a stock recovery 2e available)
Splash screen size 480 x 800 (good luck getting rid of the padlock watermark!)
So there is your info. I have changed 6 or 7 other devices splashscreens and never figured this one out. So I am excited to see if you can do it. I have the newest spl that is NOT an engineering spl so I am sure your tool won't work with my spl?