Thank you very much. I've successfully located corresponding code in Sapphire and done my modification:
08008e54 218f mov r1, #0x8f
08008e56 0049 lsl r1, r1, #0x01
08008e58 9500 str r5, [sp, #0x0]
08008e5a 9501 str r5, [sp, #0x4]
08008e5c 9502 str r5, [sp, #0x8]
08008e5e 9503 str r5, [sp, #0xc]...