Open a dummy replay file located in the "RepDummy" folder in the main MBAACC folder.
Warning: This only processes slot #01 of the replay. Saving will overwrite #01 and erase all other slots.
#This is a comment.

#Example of a dash:
L001 S6
L001 S5
L010 S6 #Inline comment

Duration. Max 256.
Numpad direction. 1 to 9.
Buttons. Max ABCD.

Reload dummy file by going back to char select.
Or Ctrl+L in framestep.