Oscam - cardsharing software project

I have a BIN file. I do not have the source code. Currently, only one serial number works of smart card. I need to make a modification for another serial number and to change it in assembler. so We can agree as follows: the software only responds to the serial number to be exchanged. for other word----> I need to make a change for another card serial number. working card 03 19 EC 16 00 00 the result should be a safe change of the serial number, for example 00 88 FC 16 00 00 the change you make will make in diassambler You will always make a change to me and I will pay you 50 USD for each change to 1250 USD. so total We need 25 changed. after paying the last installment you will know how to how to change the serial number. as I attach file its first change. please check and let me know. Also check attach file.