I'm not a scripting or programming wizard, so I would like to know if there is a script or app that I can easily modify or one pre-made that will copy a directory of files to computers on a LAN ...

You can run a series of Linux commands to copy multiple files to a folder or copy a single file to multiple folders, but you can save time and trouble by using xargs, loops and scripts.

Do you need to find or copy the full path of a file or folder? With these different ways to get the file path on Mac, use whichever works best for you.