@AvoidTheFuzz,
That sounds like a very interesting topic.
I think the first problem may be trying to prove that God is omnipresent, infinite, and necessary. I can say that in order for your thesis to hold weight, you would have to narrowly define the possibility of god and god itself before anything else. I remember from one of my last theses that half of my paper was devoted towards the definition of "person" using etymological and historical references in order build up my argument and make it credible. Especially in the realm of philosophy, God is a relative term, so that amount of definition is extremely necessary.
Then, the first thing that comes to mind when you want to provide a valid argument about the absolute characteristics of some being (namely omnipresence, infinite, and necessary) is in the structure of predicate/quantifier logic. I think in that realm you may be able to come up with some pseudo-scientific proofs to base your argument off of. Especially the necessary conditions of God you want to explore since propositional logic statements depend on either necessary or sufficient conditions. But predicate logic seems as good a place as any to find some good structure to start with.
When you get to the multiple universal theory, that's where it would definitely become the problem. Mobius strip theory is a very good area to look at. You could definitely use that in your argument. But I have always thought that any relation to God and the universe may best be proven in the materiality of the universe. Like relating god to Brownian movement and quantum physics, because in those realms the staunchest of scientists struggle with the origins of kinetic molecular theory.
But anyway, you would definitely want to keep an eye out in the metaphysics and logic sections. The philosophy of science section tends to deal specifically with bioethics, but you may still want to scan through there as well. It would be great if you wanted to start a thread and hash out your thoughts on the matter. Try the creative writing section.