It's capable of a lot more.
The advantage of using LTSP as a diskless node, instead of as an X-Terminal is that the processing is now done on the client, instead of the server. This lets you build larger networks.
Adding new packages to the LTSP build is fairly simple, but can take several steps, and a lot of backtracking until you get the build parameters correct.
The GUI is to make it easier to add new packages, build the system, track the build errors, and combine some of the steps to a couple button clicks.
It has two notebook pages
The first page looks like this:
The left tree widget shows the dependencies of the packages. If a package has multiple dependencies, it will appear under each of these.
Clicking a package name will toggle it from blue (don't do anything with this package) to red (process this package when an action button is clicked.).
If you grab a package name with a right mouse button and drag it to an edit window on the right, you can edit the package.def file.
Clicking the tree button in the upper left of the tree will rebuild the tree (if you changed a dependency you might do this).
At the very top are the action buttons.
The other notebook page looks like this while it's building a distro:
The tree on the left shows what packages have been processed. A green bullet indicates that the operation was successful. A red bullet indicates a problem.
Clicking one of the items in the tree will display the output in the text window on the right.
I'm using LTSP 4.1 and building under RedHat 9.0, with Tcl/Tk 8.4.12 installed.
I'm using RH 9.0 because that was the cleanest build environment. It worked. The newer Tcl/Tk is because I wanted to use the paned windows and labelframes that weren't available in Tcl/Tk 8.3, the standard release when RH 9.0 came out.
If you find a bug, I'll be happy to hear about it. I won't promise it gets fixed immediately, but it might get fixed.
Other environments are not guaranteed to do anything useful, but it might be interesting.
The Help button is not implemented yet. Real-Soon-Now.
This software is not yet at the release level of maturity. These are escapes.