Thanks for the quick reply. Read all the options several times and am still greatly confused..
Looks to me like Option 2 would be the easiest.
I'd recommend experimenting with the options.
The #1 is easy after the configuration is created and would provide a more automated library update on the second PC. A restart would always automatically load the most recent library. (Actually, the same can be done by just reloading the current library in File > Library...)
So if I understand I would need the path to the audio/video files have to be the same on both machines,
If I use "T:\\Music Library\...." then I would map a drive on computer B as "T:\\Music Library\....".
Then copy the backup file from computer A to computer B and restore.
1. Is this correct?
2. What is the default location for the MC backup files?
Both PCs would need to be able to access T:\Music Library\
For instance, if all files are in C:\Media\Music Library\ on one of the PCs you can share the C:\Media\ folder and map it to T: on both PCs.
Inside MC you can use the Rename, Move, & Copy Files tool for changing all file links from C:\Media\Music Library\ to T:\Music Library\ . Select all files and start the tool. In the RM&C window you can select the "Update database to point new location" option and use the Find & Replace section for changing the directory paths.
The default location for the automatic backups on XP is C:\Documents and Settings\[your user name]\Application Data\J River\Media Center 12\Library Backups\ (on Vista the application data path is different). You should be able to see the automatically created backup files when you open the Restore tool.
If you want to export the library and restore it on another PC you can run the manual Backup tool and save a new backup file in a shared folder that can be accessed through the LAN.
Disable the Auto-Import tool, create a new library backup file and try the different options with a few test files before applying any changes to the complete library.