diff --git a/Resources/installLilypond.scpt b/Resources/installLilypond.scpt
new file mode 100644
index 0000000..abbc99c
Binary files /dev/null and b/Resources/installLilypond.scpt differ
diff --git a/Resources/installPython.scpt b/Resources/installPython.scpt
new file mode 100644
index 0000000..5c4a7f7
Binary files /dev/null and b/Resources/installPython.scpt differ
diff --git a/Sources/VLAppController.mm b/Sources/VLAppController.mm
index cfbfd6a..a6c7e1a 100644
--- a/Sources/VLAppController.mm
+++ b/Sources/VLAppController.mm
@@ -97,6 +97,11 @@
 	return [self getLineFromCommand:cmd];
 }
 
+- (void)adviseLilypondInstallation:(id)sender
+{
+//	[NSApp terminate:self];
+}
+
 - (void)awakeFromNib
 {
 	[lilypondPath setAutoenablesItems:NO];
@@ -168,7 +173,87 @@
 		wantTool = true;
 		[defaults setObject:toolPath forKey:@"VLLilypondPath"];
 	}
-	[lilypondPath selectItemWithTag:wantTool ? 0 : 1];
+	[lilypondPath selectItemWithTag:wantTool ? 0 : 1];	
+}
+
+- (BOOL)promptForSoftwareInstallation:(NSString *)label
+							withTitle:(NSString *)title
+						  explanation:(NSString *)expl
+							   script:(NSString *)script
+								  url:(NSURL *)url
+{
+	NSString * hasFink = [self getLineFromCommand:@"bash -l which fink"];
+
+	NSInteger response = 
+		[[NSAlert alertWithMessageText:title
+				  defaultButton: hasFink 
+				  ? @"Install through fink" 
+				  : label
+				  alternateButton:@"Continue"
+				  otherButton:hasFink 
+				  ? label
+				  : @""
+				  informativeTextWithFormat: expl, hasFink 
+				  ? @"\n\nSince you have fink installed already, you may "
+				  "choose to install this package through fink." : @""]
+			runModal];
+
+	if (response == NSAlertAlternateReturn)
+		return NO;
+	else if (hasFink && response == NSAlertDefaultReturn) {
+		NSDictionary * error;
+		NSURL *		   scptURL = 
+			[NSURL fileURLWithPath:
+			   [[NSBundle mainBundle] pathForResource:script
+									  ofType:@"scpt"]];
+		NSAppleScript * scpt = 
+			[[NSAppleScript alloc] 
+				initWithContentsOfURL:scptURL error:&error];
+		[scpt executeAndReturnError:&error];
+	} else {
+		[[NSWorkspace sharedWorkspace] openURL:url];
+	}
+	return YES;
+}
+
+- (void)applicationWillFinishLaunching:(NSNotification *)aNotification
+{
+	BOOL       quit	   = NO;
+
+	if (!toolPath && !appPath) 
+		if ([self promptForSoftwareInstallation:@"Download from lilypond.org"
+				  withTitle: @"Lilypond Not Found!"
+				  explanation: 
+					  @"Couldn't find an installation of Lilypond, which "
+				  "is needed to typeset the sheet music. If you continue "
+				  "without installing, you will be unable to preview, "
+				  "print, or save as PDF.%@"
+				  script:@"installLilypond"
+				  url:[NSURL URLWithString:@"http://lilypond.org/web/install"]]
+		)
+			quit = YES;
+	if (![self getLineFromCommand:@"bash -l which python2.5"]) 
+		if ([self promptForSoftwareInstallation:@"Download from python.org"
+				  withTitle: @"Python 2.5 Not Found!"
+				  explanation: 
+					  @"Python 2.5 is needed to play accompaniments. The "
+				  "version preinstalled on your computer is not recent "
+				  "enough. If you continue without installing, you will be "
+				  "unable to play accompaniments, or save as MIDI.%@"
+				  script:@"installPython"
+				  url:[NSURL URLWithString:@"http://www.python.org/download"]]
+		)
+			quit = YES;
+
+	if (quit) {
+		[[NSAlert alertWithMessageText:@"Quit and Restart"
+					  defaultButton: @"OK" alternateButton: @"" otherButton: @""
+					  informativeTextWithFormat:
+					  @"The software you have chosen to install will be "
+				  "available after you restart this application."]
+			runModal];
+		[NSApp terminate:self];
+	}
 }
 
 - (IBAction) playNewPitch:(id)sender
diff --git a/Vocalese.xcodeproj/project.pbxproj b/Vocalese.xcodeproj/project.pbxproj
index 3f56d60..112e4e3 100644
--- a/Vocalese.xcodeproj/project.pbxproj
+++ b/Vocalese.xcodeproj/project.pbxproj
@@ -21,6 +21,8 @@
 		95009B800B0EDC7B00EB33A4 /* CADebugMacros.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 95009B4E0B0ED0BB00EB33A4 /* CADebugMacros.cpp */; };
 		95009B810B0EDC7D00EB33A4 /* CAStreamBasicDescription.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 95009B260B0ECF9000EB33A4 /* CAStreamBasicDescription.cpp */; };
 		95009B830B0EDCD800EB33A4 /* CoreFoundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 95009B820B0EDCD800EB33A4 /* CoreFoundation.framework */; };
+		95049CF30BDC32EB0015EE6E /* installLilypond.scpt in Resources */ = {isa = PBXBuildFile; fileRef = 95049CF20BDC32CD0015EE6E /* installLilypond.scpt */; };
+		95049D020BDC436A0015EE6E /* installPython.scpt in Resources */ = {isa = PBXBuildFile; fileRef = 95049D010BDC43510015EE6E /* installPython.scpt */; };
 		950795E10B4A34D9008911A6 /* stop.tiff in Resources */ = {isa = PBXBuildFile; fileRef = 950795E00B4A34D9008911A6 /* stop.tiff */; };
 		952CBB9C095FD1CA00434E43 /* VLSoundOut.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 952CBB9A095FD1CA00434E43 /* VLSoundOut.cpp */; };
 		952CBB9D095FD1CA00434E43 /* VLSoundOut.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 952CBB9A095FD1CA00434E43 /* VLSoundOut.cpp */; };
@@ -144,6 +146,8 @@
 		95009B620B0ED18700EB33A4 /* CAConditionalMacros.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; name = CAConditionalMacros.h; path = Sources/CoreAudioSDK/CAConditionalMacros.h; sourceTree = "<group>"; };
 		95009B630B0ED18700EB33A4 /* CAMath.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; name = CAMath.h; path = Sources/CoreAudioSDK/CAMath.h; sourceTree = "<group>"; };
 		95009B820B0EDCD800EB33A4 /* CoreFoundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreFoundation.framework; path = /System/Library/Frameworks/CoreFoundation.framework; sourceTree = "<absolute>"; };
+		95049CF20BDC32CD0015EE6E /* installLilypond.scpt */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.scpt; name = installLilypond.scpt; path = Resources/installLilypond.scpt; sourceTree = "<group>"; };
+		95049D010BDC43510015EE6E /* installPython.scpt */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.scpt; name = installPython.scpt; path = Resources/installPython.scpt; sourceTree = "<group>"; };
 		950795E00B4A34D9008911A6 /* stop.tiff */ = {isa = PBXFileReference; lastKnownFileType = image.tiff; name = stop.tiff; path = Resources/stop.tiff; sourceTree = "<group>"; };
 		952CBB98095FD19D00434E43 /* TVLSoundOut */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = TVLSoundOut; sourceTree = BUILT_PRODUCTS_DIR; };
 		952CBB9A095FD1CA00434E43 /* VLSoundOut.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; name = VLSoundOut.cpp; path = Sources/VLSoundOut.cpp; sourceTree = "<group>"; };
@@ -387,6 +391,8 @@
 		2A37F4B8FDCFA73011CA2CEA /* Resources */ = {
 			isa = PBXGroup;
 			children = (
+				95049CF20BDC32CD0015EE6E /* installLilypond.scpt */,
+				95049D010BDC43510015EE6E /* installPython.scpt */,
 				954DD4DF0B44E61E0056C504 /* VLDocument.nib */,
 				954DD4DA0B44E6000056C504 /* MainMenu.nib */,
 				95FC66BC0AF0A4D4003D9C11 /* console.icns */,
@@ -586,6 +592,8 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				95049D020BDC436A0015EE6E /* installPython.scpt in Resources */,
+				95049CF30BDC32EB0015EE6E /* installLilypond.scpt in Resources */,
 				8D15AC2C0486D014006FF6A4 /* Credits.rtf in Resources */,
 				8D15AC2F0486D014006FF6A4 /* InfoPlist.strings in Resources */,
 				95B3E1A70960E58B000E9C0D /* Music in Resources */,
diff --git a/mma/mma.py b/mma/mma.py
index cabd499..a2425e4 100755
--- a/mma/mma.py
+++ b/mma/mma.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2.5
 
 """
 The program "MMA - Musical Midi Accompaniment" and the associated