DVD recorder based on freebsd, how to edit service disc

I am trying to understand what is written here and how it can be done. Maybe someone will be able to help and understand this: https://forum.videohelp.com/threads/306345-some-problem-with-DVR560H-s-HDD-replacement#post1906393 This is probably a method to remove the disk size limit that a DVD writer can use after initialize HDD, prevent to change hdd to bigger size. GGV disc: https://archive.org/details/pioneer-ggv-1321-type-2 This iso must be burn on dvd disc and loading in dvd recorded to initialize new HDD. Question is how **"remark* reCompile Kernel and rc.local edit it GGV disk"**. Thank you.