Geno, a couple options. First, you should know that Lightroom is not designed to be "shared" over a network. So to share it between two computers, you have to transfer the catalog settings. One way to do this is to have your catalog on an external drive that is not a "network drive" and move the drive between computers. Or, you can save your metadata to a "sidecar" xmp file and then read the metadata on the other computer. The problem with this approach is that not everything translates over, Collections don't and I don't think flags do either. So, what I'd suggest is copying over your catalog folder when you are ready to switch and then copying back. It's a hassle, but I don't know how else to get all the functions/settings properly moved.