Nathan,
I don't think there is much to it:
1. Fork project on github and clone your personal repo.
2. Create a sensible name, no idea what that would be ;)
3. Add that name to the list in dvb_lnblist_get() (copy existing)
4. Add settings to dvb_lnb_get_frequencies() (copy existing structure)
5. Push commits to github.
4. Submit PR on github ;)
But if not submit a feature request with a sensible name and required settings and I'll try and add something when I get a chance.
Adam