An extra instrument file for adding the Bodhrán to Musescore, it needs to be added as an instrument extension using the MuseScore menu. Below are the instructions for Mac and Linux:

MuseScore-2

1. copy file musescore-2/instruments.xml to Documents/MuseScore2/Extensions/instruments.xml
2. within Musescore menu navigate to: MuseScore then Preferences... then Score tab
3. in the Default Files panel, add the file to 'Instrument List 2' extension
4. browse to Documents/MuseScore2/Extensions/instruments.xml and apply to 'Instrument List 2'

MuseScore-3

1. copy file musescore-3/instruments.xml to Documents/MuseScore3/Extensions/instruments.xml
2. within Musescore menu navigate to: MuseScore then Preferences... then Score tab
3. in the Default Files panel, add the file to 'Instrument List 2' extension
4. browse to Documents/MuseScore3/Extensions/instruments.xml and apply to 'Instrument List 2'

You may now add a Bodhrán staff using menu item Edit then Instruments... where the Bodhrán is listed under 'World Music' 'Percussion - Unpitched'.

In the examples directory there is an example score showing both Bodhrán and Tin Whistle staves.

Once a Bodhrán instrument staff is added to the score then there is no need to keep this instrument file in the 'Instrument List 2' extension.