with your S2000, sounds like a great combo indeed.
blip the throttle a tad before the AT downshifts to minimize the downshift shock.
the less shock, the longitivity of the AT. it's a shift-lever, blip in that sequence.
you need to downshift like you do your S2K before the turn while braking
(do a left foot brake, blip with right), make sure your CG is on your front
tires and moderately turn-in, keep turning a tad more aiming for the inner
corner and accelerate out. the car will naturally want to understeer so
you have to anticipate that in your throttle and calculate by trial and error.
it's nothing like your FR car... i know cause i have a FR as well.