Instead of creating files per tune, folders can be used to create the full and separate scores

Though not yet sure whether to continue.
This one works

airs/morag_of_dunvegan/morag_of_dunvegan.bass.ly

@@ -0,0 +1,20 @@
+\version "2.18.2"
+
+\include "morag_of_dunvegan.format.ly"
+\include "morag_of_dunvegan.notes.bass.ly"
+
+\score {
+    \new PipeBandDrumStaff {
+        \time 6/8
+		<<
+			{\formatA \formatB}
+			{\bassA \bassB}
+		>>
+	}
+	\header {
+		title = "Morag of Dunvegan"
+		meter = "Slow Air"
+		composer = ""
+		instrument = "Bass"
+	}
+}

airs/morag_of_dunvegan/morag_of_dunvegan.drums.ly

@@ -0,0 +1,39 @@
+\version "2.19.0"
+
+\include "morag_of_dunvegan.format.ly"
+\include "morag_of_dunvegan.notes.bass.ly"
+\include "morag_of_dunvegan.notes.tenor.ly"
+\include "morag_of_dunvegan.notes.side.ly"
+
+\score {
+	\new StaffGroup <<
+		\new PipeBandDrumStaff = "side" {
+			\set PipeBandDrumStaff.instrumentName = #"Side "
+			\set PipeBandDrumStaff.shortInstrumentName = #"S.D. "
+
+			\time 6/8
+			<<
+				{ \formatA	\formatB }
+				{ \snareA	\snareB }
+			>>
+		}
+		\new PipeBandDrumStaff = "bass" {
+			\set PipeBandDrumStaff.instrumentName = #"Bass "
+			\set PipeBandDrumStaff.shortInstrumentName = #"B.D. "
+
+			\bassA
+			\bassB
+		}
+		\new PipeBandDrumStaff = "tenor" {
+			\set PipeBandDrumStaff.instrumentName = #"Tenor"
+			\set PipeBandDrumStaff.shortInstrumentName = #"T.D. "
+
+			\tenorA
+			\tenorB
+		}
+	>>
+	\header {
+		title = "Morag of Dunvegan"
+		meter = "Slow Air"
+	}
+}

airs/morag_of_dunvegan/morag_of_dunvegan.format.ly

@@ -0,0 +1,4 @@
+\version "2.19.0"
+
+formatA = { \repeat volta 2 { \repeat unfold 8 { s4. s4. } } }
+formatB = { \repeat volta 2 { \repeat unfold 8 { s4. s4. } } }

airs/morag_of_dunvegan/morag_of_dunvegan.notes.bass.ly

@@ -0,0 +1,23 @@
+% 6/8 Morag of Dunvegan
+% Bass
+\version "2.18.2"
+bassA = \drummode {
+	d4.		d8 r8 g8 |
+	d4.		d8 g8 d8 |
+	d4.		g8 d8 g8 |
+	d8 r8 g8	d4.	 |
+	d4.		d8 r8 g8 |
+	d4.		d8 g8 d8 |
+	d4.		g8 d8 g8 |
+	d8 r8 g8	d4.	 |
+}
+bassB = \drummode {
+	d4.		g4.	|
+	d4.		g4.	|
+	d4.		g8 d8 g8	|
+	d4 g8	d4.	|
+	d4.		g4.	|
+	d4.		g4.	|
+	d4 g8		d4 g8	|
+	d8 g8 d8		g4.	|
+}

airs/morag_of_dunvegan/morag_of_dunvegan.notes.side.ly

@@ -0,0 +1,30 @@
+% 6/8 Morag of Dunvegan
+% Tenor
+\version "2.18.2"
+snareA = \drummode {
+	\flamd d8 d8:32( g8)		\flamd d8 r8 \flamd d8 |
+	g8 d8:32( g8)		g8 \tuplet 3/2 { d16 g d } g8 |
+
+	\flamd d8 d8:32( g8)		\flamd d8 r8 d8 |
+	\tuplet 3/2 { d16 g d } g8 \flamd d8		d4.:32(\< |
+
+	d8)\! d8:32( g8)		\flamd d8 r8 \flamd d8 |
+	g8 d8:32( g8)		\flamd d8 \tuplet 3/2 { d16 g d } g8 |
+
+	\flamd d8 d8:32( g8)		\flamd d8 g16. d32-> g16. g32 |
+	d4.:32(		d4.)
+}
+
+snareB = \drummode {
+	d16.-> g32 d16. d32 g8		d8:32(-> g8) \flamd d8 |
+	d16.-> g32 d16. d32 g8		\flamd d8-> \tuplet 3/2 { d16 g d } g8 |
+
+	d16.-> g32 d16. d32 g8		d8:32(-> g8) \flamd d8 |
+	\tuplet 3/2 { d16 g d } g8 \flamd d8		d4.:32(\< |
+
+	d16.)->\! g32 d16. d32 g8		d8:32(-> g8) \flamd d8 |
+	d16. g32 d16. d32 g8		\flamd d8-> \tuplet 3/2 { d16 g d } g8 |
+
+	\flamd d8 d8:32( g8)		\flamd d8 g16. d32-> g16. g32 |
+	d4.:32(		d4.)
+}

airs/morag_of_dunvegan/morag_of_dunvegan.notes.tenor.ly

@@ -0,0 +1,29 @@
+% 6/8 Morag of Dunvegan
+% Tenor
+\version "2.18.2"
+tenorA = \drummode {
+	d8 g8 d8	g8 d8 g8 |
+	d8 g8 d8	g4.	|
+
+	d8 r8 g8	d8 g8 d8 |
+	g8 r8 d8	g4.	|
+
+	d8 g8 d8	g8 d8 g8	|
+	d8 g8 d8	g4.|
+
+	d4 g8		d4 g8 |
+	d8 g8 d8 	g4.
+}
+tenorB = \drummode {
+	d8 g8 d8	g8 d8 g8	|
+	d4.			g4.	|
+
+	d8 g8 d8	g8 d8 g8 |
+	d4 g8		d4.|
+
+	d8 g8 d8	g8 d8 g8 |
+	d4.			g4.	|
+
+	d8 g8 d8	g8 d8 g8 |
+	d8 g8 d8	g4.
+}

airs/morag_of_dunvegan/morag_of_dunvegan.side.ly

@@ -0,0 +1,20 @@
+\version "2.18.2"
+
+\include "morag_of_dunvegan.format.ly"
+\include "morag_of_dunvegan.notes.side.ly"
+
+\score {
+    \new PipeBandDrumStaff {
+        \time 6/8
+        <<
+			{\formatA \formatB}
+			{\snareA \snareB}
+		>>
+	}
+	\header {
+		title = "Morag of Dunvegan"
+		meter = "Slow Air"
+		composer = ""
+		instrument = "Side"
+	}
+}

airs/morag_of_dunvegan/morag_of_dunvegan.tenor.ly

@@ -0,0 +1,20 @@
+\version "2.18.2"
+
+\include "morag_of_dunvegan.format.ly"
+\include "morag_of_dunvegan.notes.tenor.ly"
+
+\score {
+    \new PipeBandDrumStaff {
+        \time 6/8
+        <<
+			{\formatA \formatB}
+			{\tenorA \tenorB}
+		>>
+	}
+	\header {
+		title = "Morag of Dunvegan"
+		meter = "Slow Air"
+		composer = ""
+		instrument = "Tenor"
+	}
+}