I haven't read through this whole topic but anyway, here's my two cents.
My grade 8 science teacher told me that science is the study of everything. This is the best definition I've ever had of science.
However, when taking part in science, this, as you all probably know do. You conceive a hypothesis (it doesn't have to be testable, the big bang is not testable, only on computer screens where by the results are designed, not tested. This isn't a real big bang!) You then get evidence to support your hypothesis then it becomes a theory. Simple! If the evidence contradicts the theory, get a new hypothesis. Creationist propose the Bible as there hypothesis, they then go out and gain evidence to make it a valid theory. Creation and ToE are the two best theories, if you dissaprove of one, jump ship and take on the other theory. Don't sit back and claim one of them isn't science.
I don't see how creation isn't science. It follows the best definition I've ever been given of science and also abides with the workings of a scientific model. What is so hard to undertand? Everything in science starts of with a belief, no matter how straight forward (such as gravity) it seems, it is still just a belief.