Copy this directory under the ~/.tkabber/plugins directory
so that you get a hierarchy like this:
  ~/.tkabber/plugins
  ~/.tkabber/plugins/floatinglog/
  ~/.tkabber/plugins/floatinglog/floatinglog.tcl

Restart Tkabber, to get the plugin loaded.

Set option Tkabber -> Plugins -> FloatingLog -> show_log to enable plugin.
