Hi SandBag,
Yes I use screengrabs from Google Earth.
I use the Google Earth 'ruler' & 'line/path' tools; to lay a 1-kilometer line
vertically on the left-hand side of the view, then take a screengrab.
Then using Irfanview, I crop the image to exactly match that line, so I get a 1Km square pic.
This is then saved (named appropriately), & I then replace the default
basemap pic. of each basemap, with the appropriate cropped screengrab.
I then position just a few of the basemaps, being careful to align them properly.
As an aid to alignment, in Google I turn on the lat/long display grid; so that on each screengrab you have that grid too.
The basemaps I lower below the layout, & then in Surveyor, using the "F9" key, I alternate between texture/no-texture, so I can see where to place buildings etc etc.
It's a great way to see what foliage is there too, & to check elevations.
Roy (sorry forgotten name) is doing a fantastic job on the Sydney & environs railway network, using Google Earth, in combination with the Sydney mapping; available on CD.