For the last 4 sets of 2 digits, replace as follows and use this code:

900A 006D 0000 0001 FE01 00FF

This is the NEC protocol with device = 254 (0xFE) and function code 0 (0x00)

I presume that you have a datasheet from Yamaha so you can simply replace the last 4 digits in the code above for different function code numbers.

You can also search this forum for +Makehex +NEC1.irp and can read up on what these numbers mean.