Reducing current limiter on an A4988 stepper board

I've read a lot about the chopper circuits used, and am giving up on using external resistors.......i need to find an onboard solution to cut the settable values down to 1/10th of the values (now 0,15-2A, needed 20-200mA).

I have yet to figure it out thoough....since i cannot find any board documentation despite intense google searches.

104 resistors are 100kOhm, the 103 is 10kOhm and the 203 is 20kOhm. The 2 R22 are 0.22Ohm.....