My backup solution deals with the server and laptop separately. Rather than move images from the server folder back to the laptop drive I copied the folder onto a USB stick. Windows 7 mounts the stick as F: and wouldn’t let me change it, DOS subst commands worked in the DOS shell but didn’t show in Explorer. Visual-Subst came to the rescue allowing F:\ to be easily mapped to P:. On starting Lightroom it found the images on P: where it expected them and let me do the edits. When I’m done I can just trash the P: files as I know the masters are still on the server.