BarnOwl plugins will typically be distributed as a `.par` file. To install a plugin, make a directory `~/.owl/modules`, and place the `.par` file into that directory. Make sure to preserve its name -- this is significant to BarnOwl.

To load the module, from within BarnOwl, execute the `:reload-module MODULE-NAME` command, where `MODULE-NAME` is the name of the `.par` file, without the trailing `.par`.

If anything goes wrong, you may be able to get more information about the error using `:show errors`.