Alan Peed , Apr 21, 2010; 04:26 p.m.
The first idea that comes to my mind is to install two standalone copies of lightroom, same version & level, so they are exactly alike. Install one copy on the desktop, and a second copy on the laptop. Then get yourself a a high capacity external USB hard-drive and put all the picture files and folders on the USB hard drive. Use the USB hard drive as a shared file storage device that can be used on either system. That might work. That would save you from having to transfer pic files from one computer to another, because the pic files are being saved to the shared HD all the time. However, keep all the CFG Files required by Lightroom saved to the C drive on the computer where LR is installed. That way LR will keep on running even when you move the USB HD to the other system.