I don't offhand know of a non-root way of replacing the bootanimation. A ROM could be set up to allow this, but networks want their branding there so they never in my experience do this.
Rooting tools are generally phone-specific. That's the problem. There's something called "unlock root" which claims to be able to do a large number of phones (unlockroot.com), though it doesn't list that precise model. But I know nothing about this beyond that it exists.
You've not said what the step superoneclick fails on actually is, but one generic question: do you have adb drivers installed on your computer?