Launching the file vst.media_addon opens a preferences panel which you can use to set the directory containing your VST plugins. By default this directory is set to

	/boot/home/config/add-ons/media/vstplugins

You can also use this panel to install and deinstall plugins on the fly. Any change to the list of installed plugins will take effect immediately without having to restart Media Services.

• Installing Plugins
  To install a plugin, you can either drop the plugin file on the left-hand list or use the Add... button, which will open a file panel you can use to select the plugin file. You can also install multiple plugins in a batch with both methods.
  
  You can find a list of VST plugins currently available for BeOS on my website. Note that they will have to be explicitly compiled for BeOS, so downloading and installing plugins for Windows/MacOS will not work.
  
  If you try to install something that is not a VST plugin, a warning will be displayed and installation of that file will be aborted.
  
  Do not try to organize your plugins in sub-directories! The VST add-on only loads plugins that are at the top-level of the plugins directory.
  
  
• Deinstalling Plugins
  Similarly, you can deinstall a plugin by pressing the Remove button, which will move all selected files to trash. You can also drag the current selection out of the list into trash or into any other folder.

By selecting a plugin in the list, the panel will display some basic information about it on the right-hand side, like the number of parameters, programs, input and outputs it provides, and if it is supported by the current implementation (unsupported plugins will appear grayed out in the list).

The Defaults button will simply change the plugin directory back to the default, just as you would expect. Pressing Revert will undo any changes you made to the directory since the panel has been opened. None of these operations affect the actual plugins.