It's really not that much more involved.
Use the 'light bulb' icon and adjust the two sun angles in the light dbx.
Leave environmental light and photons off while you're testing to speed things up and try different sun intensities. You can also use the 3D defaults for adjusting exterior ambient as well to brighten/darken a scene.
If you have the env. light and photon off you can get an idea within 30 - 40 second of where you're and start adjusting.