Making an irobot_create_2_1 service [closed]

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I'm attempting to make a service for the irobot create to play a sound. The sound functions are implemented in the driver.py and in the create.py files, but there are no services to actually utilize those functions; they go completely unused. I looked through the service files (_Brake.py, _Tank.py, etc), and it seems that all of the service files are exactly the same, asides from the class names and the md5sums. Is this a reasonable assumption?

Also, what are the md5sums the sum of?

Thanks ahead