There just isn't any good way to change v2 config files without lots of pain
Not that we really have a great story for v3 either,
..
really a generic way to override config without editing text files would be the most ideal.
How about one environment variable that points to another file with options?
The unfortunate thing is that either this adds lots more Config.lb files (one for each payload combination or ROM size), or forces you to patch the buildrom-specific file you just introduced.
I think it's more important to figure out how we really want to configure LinuxBIOS (it seems to be a large hurdle for newbies), not buildrom.
Once it's easy to configure LinuxBIOS it will be easy to do it with buildrom.
Myles