Yes, we will send instructions to everyone that needs to send a replay.
0.000 is intended to be a theoretical minimum possible time.
The handicap is calculated as follows:
step 1: take the fastest 50% of the submissions
step 2: find the mean and standard deviation of this subset
step 3: two standard deviations faster than this mean is the "zero par"
step 4: zero par is assigned a handicap value of 1.000
step 5: various multiples of the standard deviation are added to this zero par time to find 0.000, 2.000, 3.000, etc.