As usually, copy this directory under the ~/.tkabber/plugins directory
so that you get a hierarchy like this:
  ~/.tkabber/plugins
  ~/.tkabber/plugins/customstatus/
  ~/.tkabber/plugins/customstatus/customstatus.tcl

Restart Tkabber, to get the plugin loaded.

Now you can edit your custom presence statuses and their
description using the newly added toolbar button.
Also you can open the presence presets editor using the
"Tkabber->Plugins->Edit presence presets" main menu item.

Consult the README file for the details about using this plugin.

