Hi Kirk,
To transfer one catalog into another catalog within lightroom:
1. Select the folders and photos within these folders that you wish to transfer. (see #1 below)
2. Select the "export catalog" command from the "File" table. (see #2 below)
3. In the Export as Catalog dialog box, name the folder and direct lightroom where to place the folder. Make sure the "export negative files" and "include available previews" boxes are checked if you wish to include the raw files in your transfer. (see #3 below)
4. Attach your laptop to your desktop either directly with firewire, USB, or via network.
5. From your desktop PC, open lightroom and access the "import from catalog" command in the "File" table. Lightroom will ask you to locate the catalog file you created on your laptop (remember where you put it ;-)!) which is denoted by a ".Ircat" suffix.
6. In the "import" dialog box specify where you want the raw files to be placed and lightroom will transfer the raw files including any adjustments, keywording, etc that you made to your photos.
Imasleeper