diff --git a/res/install_local_mac b/res/install_local_mac
index bf517cc..9b870bf 100755
--- a/res/install_local_mac
+++ b/res/install_local_mac
@@ -1,4 +1,6 @@
 #!/bin/bash
+# Use this script to install the library directy from the git clone.
+
 
 if [[ -d /Applications/Arduino.app ]]
 then
@@ -31,7 +33,7 @@ then
     # Copy doc
     mkdir $lib_path/doc
     
-    cp ../doc/* $lib_path/doc
+    cp -r ../doc/* $lib_path/doc
     
 else
     echo "Arduino application not found."
diff --git a/res/install_mac b/res/install_mac
index 9eaeac1..b94a610 100755
--- a/res/install_mac
+++ b/res/install_mac
@@ -1,10 +1,20 @@
 #!/bin/bash
+# This script installs the Arduino MIDI Library into the Arduino application, 
+# so that every sketch can include it directly, without having to copy anything.
+#
+# To install the library, run this script by double-clicking it,
+# it should be directly executable and seen as such by Mac OS X.
+# If not, open a terminal, cd to the script location, and run ./install_mac
+# 
+# Open the Arduino IDE, and you're ready to go!
+
+# The script assumes the Arduino application
+# is installed in the default location.
 
 if [[ -d /Applications/Arduino.app ]]
 then
     
     # Define locations
-    
     lib_path=/Applications/Arduino.app/Contents/Resources/Java/libraries/MIDI
     
     if [[ -d $lib_path ]]
@@ -20,7 +30,7 @@ then
     cp -r * $lib_path
     
     # Cleanup
-    rm $lib_path/install_mac.sh
+    rm $lib_path/install_mac
     
 else
     echo "Arduino application not found."
diff --git a/res/packaging b/res/packaging
index dbad4b8..33ee9c3 100755
--- a/res/packaging
+++ b/res/packaging
@@ -1,4 +1,13 @@
 #!/bin/bash
+# 
+# Generate an archive with packaged content for easier delivery.
+# The generated archive contains:
+#   - Source files (MIDI.cpp / MIDI.h)
+#   - Resources (keywords.txt)
+#   - Documentation (Doxygen)
+#   - Examples for Arduino IDE
+#   - Installation scripts
+
 
 # Create a temporary destination folder
 mkdir -p temp/doc
diff --git a/src/MIDI.cpp b/src/MIDI.cpp
index 7ffc5b0..c66f4fe 100644
--- a/src/MIDI.cpp
+++ b/src/MIDI.cpp
@@ -285,31 +285,17 @@ void MIDI_Class::sendAfterTouch(byte Pressure,
 
 /*! \brief Send a Pitch Bend message using a signed integer value.
  \param PitchValue  The amount of bend to send (in a signed integer format), 
-                    between -8192 (maximum downwards bend) 
-                    and 8191 (max upwards bend), center value is 0.
+                    between MIDI_PITCHBEND_MIN and MIDI_PITCHBEND_MAX, 
+                    center value is 0.
  \param Channel     The channel on which the message will be sent (1 to 16).
  */
 void MIDI_Class::sendPitchBend(int PitchValue,
                                byte Channel)
 {
     
-    unsigned int bend = PitchValue + 8192;
-    sendPitchBend(bend,Channel);
+    unsigned int bend = PitchValue - MIDI_PITCHBEND_MIN;
     
-}
-
-
-/*! \brief Send a Pitch Bend message using an unsigned integer value.
- \param PitchValue  The amount of bend to send (in a signed integer format), 
-                    between 0 (maximum downwards bend) 
-                    and 16383 (max upwards bend), center value is 8192.
- \param Channel     The channel on which the message will be sent (1 to 16).
- */
-void MIDI_Class::sendPitchBend(unsigned int PitchValue,
-                               byte Channel)
-{
-    
-    send(PitchBend,(PitchValue & 0x7F),(PitchValue >> 7) & 0x7F,Channel);
+    send(PitchBend,(bend & 0x7F),(bend >> 7) & 0x7F,Channel);
     
 }
 
@@ -1032,7 +1018,7 @@ void MIDI_Class::launchCallback()
             
             // Continuous controllers
         case ControlChange:         if (mControlChangeCallback != NULL)         mControlChangeCallback(mMessage.channel,mMessage.data1,mMessage.data2);    break;
-        case PitchBend:             if (mPitchBendCallback != NULL)             mPitchBendCallback(mMessage.channel,(int)((mMessage.data1 & 0x7F) | ((mMessage.data2 & 0x7F)<< 7)) - 8192);    break; // TODO: check this
+        case PitchBend:             if (mPitchBendCallback != NULL)             mPitchBendCallback(mMessage.channel,(int)((mMessage.data1 & 0x7F) | ((mMessage.data2 & 0x7F)<< 7)) + MIDI_PITCHBEND_MIN); break; // TODO: check this
         case AfterTouchPoly:        if (mAfterTouchPolyCallback != NULL)        mAfterTouchPolyCallback(mMessage.channel,mMessage.data1,mMessage.data2);    break;
         case AfterTouchChannel:     if (mAfterTouchChannelCallback != NULL)     mAfterTouchChannelCallback(mMessage.channel,mMessage.data1);    break;
             
diff --git a/src/MIDI.h b/src/MIDI.h
index 4a375bd..0c1327c 100644
--- a/src/MIDI.h
+++ b/src/MIDI.h
@@ -60,6 +60,10 @@
 
 #define MIDI_SYSEX_ARRAY_SIZE   255         // Maximum size is 65535 bytes.
 
+#define MIDI_PITCHBEND_MIN      -8192
+#define MIDI_PITCHBEND_MAX      8191
+
+
 
 /*! Enumeration of MIDI types */
 enum kMIDIType {
@@ -168,7 +172,6 @@ public:
     void sendProgramChange(byte ProgramNumber,byte Channel);
     void sendControlChange(byte ControlNumber, byte ControlValue,byte Channel);
     void sendPitchBend(int PitchValue,byte Channel);
-    void sendPitchBend(unsigned int PitchValue,byte Channel);
     void sendPitchBend(double PitchValue,byte Channel);
     void sendPolyPressure(byte NoteNumber,byte Pressure,byte Channel);
     void sendAfterTouch(byte Pressure,byte Channel);