We have always welcomed hacking and modifying of the OpenROV platform. In order to make this as easy as possible we put the files for the hardware, electronics, and software all online and available for the community.
We released the OpenROV v2.8 about a month and a half ago and have all the files together and available for you to use for your hacking purposes.
We hope this gets you started to modifying your OpenROV for your specific needs.
If you run across any issues with any of the files please open an issue on the respective GitHub page so we can track it and solve the problem.