BQ27742-G1: want to modify Design Capacity into bq27742-g1

I have some doubts in accessing data flash like, after the unsealing press of fuel gauge.

There is requirement of any kind of bit setting like CFG_UPDATE in bq27441 ?. 

if yes then how to done to modify Design Capacity in bq27742-g1.? 

I want to modify Design Capacity also , so access Subclass 48 (0x30), Offset 12. after updating that value require the soft reset or not.?

after modifying Design Capacity value can read the value which is entered by host from 0x3c address.?

I am Successfully Read Data like Voltage , SOC , Remaining capacity. but i can't able write set capacity into flash please provide me some steps write set capacity into flash using Micro controller as a host.i'm using MSP430g2553 as a host Micro controller.

bq-27742-g1 have Impedance track algorithm how it would be helpful to me. how it is worked for me.

Thanks & Regards
 Kalarav