Haha there you go, much more coherent now. I was wondering what you meant about the part with the scholarships having been awarded (that part wasn't worded well in your original post). I would imagine that not everyone who gets a scholarship at school B will matriculate, so you may yet get something down the line (i.e. a recycled scholarship) if you let them know that's what it'll take.
This is pure conjecture but I think the dean of admissions has a bigger stake in considering your request/ultimatum than the head of financial aid. The head of finaid probably couldn't care less whether you come to the school or not, wheras the dean of admissions might consider you an essential addition to the class, etc. and be willing to do what it takes, or worry about the acceptance yield (not having to go to the waitlist), whatever reasons. It depends on how competitive you think you are, or how much leverage you think you may have.
So perhaps if I were in your shoes, I'd call up the finaid office again and find out what happens if someone declines these scholarships - do they get recycled? And how do they decide who gets those? If there's a slight possibility that you could get it, then at that point call up the dean of admissions and go something like, "I really love your school, the educational opportunities and would be happy to matriculate. But finances make it difficult to commit right away, and ____ in finaid said there might be scholarships later. This would certainly solidify my decision to matriculate, but without that, I doubt I will be able to". Depends on how heavy-handed you want to be.
Just my 2c... congrats on the scholarship to school A!
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