I think he's asking how important SAT scores are to postbac programs, and if he should send the score in or take the GRE for a possible superior score.
In my experience SAT scores aren't really important at all to postbac programs (I could be wrong, but the ones I looked at in NY and PA didn't care all that much.) They're more interested in your GPA and, depending on whether your target program is formal/informal, how many (if any) science courses you took in your undergrad college. My SAT score was the other way around--high verbal, horrible math. I was still accepted at Columbia's postbac because my GPA was >3.0 and I hadn't taken a single pre-req.
If I didn't understand your question correctly, I'm sorry. Just thought I'd give it a shot.