For item one, just start out grid charged and do the acceleration tests with assist in the gear dictated by the ODBIIC&C guide thread (which I printed out for reference).
For item two, I'd do a discharge using assist until it won't go any further, then reset the SoC to medium via the gauge and do it again. If it doesn't do a negative recal, do it again. Once it does a negative recal immediately you are ready to grid charge (you won't be able to keep it from force charging some on the way to your garage once you hit that level unless you floor it, but that's okay.). That will get you a safe discharge of the pack to the point of a low voltage trigger point.