It's at http://ctiberg.alturl.com/WebArc001.zip - come grab it!
This plugin requires Total Commander v5.50 or later.
The idea is to have a packer plugin for Total Commander that has a counterpart that can be run on a web server.
That way, you can upload or download a single file instead of multiple small ones, which takes lots of time using FTP.
The plugin is written in Delphi, and the source code is included.
The server side is currently only available in PHP, but future versions may include a .NET version too.
The source code requires a few units from the Key Objects Library (KOL), which can be found at http://bonanzas.rinet.ru/.
Be sure to grab the main KOL archive as well as KOLZLib if you want to recompile the sources.
This is released 'as-is', without any kind of warranty.
Best of luck with the plugin