yep, trust me -- your bio score is going to improve astronomically once you do some solid foundation review. it's probably the easiest section to improve just through sheer knowledge, in my opinion. PS is a bit tougher, but if you thoroughly comb through your formulas and get used to thinking conceptually, i'm positive you can bring it up to at least a 10 by august.
your high verbal is great news! now do many many many passages --do not let up on verbal just b/c your score was good. i scored a 14 on my verbal diagnostic, and my VR score went progressively downhill b/c i got complacent and didn't practice.
i'm still awaiting my scores though, so take my advice for what it's worth
good luck!!!