KFWDKMSN Map for desired throttle plate angle
KFWDKPP Throttle blade position dependent on air charge signal
Those maps arent active if you set fuedk without momentstructure, wdksap will be the final throttle blade output which comes mainly from FPWDKAPP (+ a temp based offset) or a set value depending on how you set the appropiate bits up and ignition on (starting) throttle angle is already offset to ensure engine start, but like I said there are most likely min values that wont allow the throttle angle to below a certain number no matter what you put in fpwdkapp at 0% wped when the engine is running, never tried though in my 2 years of running with fpwdkapp.
PS. Anyway kinda derailed the topic, what you are trying to achieve OP is a waste of time with no real benefits, specially on a manual car.