Thanks, Erika. I should add another probably obvious tip - besides saving the color image from GE, to replace the B/W one, consider opening the color image in a photo editor first to do some adjustments. Besides cloning out some of the Google text (much of which can be turned off in the GE view options) - I found that to get a good Lightworks render, I needed to adjust the image levels a bit. For areas with water, the Google satellite imagery often shows splotchy odd colors. It's nice to smooth that out and overlay some blue, etc...
Cheers,
Karl