This doesn't seem like a "development" question. Are you asking for programming help in disabling hardware components, or are you just asking about how to change settings in the firmware, which oddly is exactly what the section of the manual you're quoting is already telling you how to do?
When you turn off a setting, if that setting uses special hardware, that hardware will automatically be disabled if that's something we know how to do. It's not something user-facing. As the manual section you quoted say, the manual gives you an overview of the relevant settings. Some of us watch the -dev list only, because it's for actual development issues, and choose not to be involved with the support list. Please don't bring your support issues over to this list if you aren't getting answers there. And if you didn't even ask this there first, well, that's where it really should've been asked if it's about non-development issues.
