I installed documentation available. Since LEAF-Bering uClibc recently evolved from plain old LEAF-Bering, the documentation is currently made up of the original LEAF-Bering installation and user's guides, and then separate LBU installation and user's guides which outline the new or changed features.
Be sure to read these guides (I printed them out) before getting started, and maybe even join the LEAF user mailing list. It's also a good idea to at least have a look at the extensive Shorewall documentation, especially the quick start guides. Once you boot the LBU floppy disk, you'll be presented with the following text-based configuration utility.
Figure 1: Configuration Menu
In addition to the documentation I mentioned earlier, there's even a brief online help system that you can access through the configuration utility, as shown below.
Figure 2: Packages Help Menu