I spoke with racb and he thought that "the right thing to do might be to debconf-ize grub-legacy-ec2 so that you don't need to change the [grub's menu.lst] manually." rather than changing things outside of packaging within the cloud image build.
I spoke with racb and he thought that "the right thing to do might be to debconf-ize grub-legacy-ec2 so that you don't need to change the [grub's menu.lst] manually." rather than changing things outside of packaging within the cloud image build.