diff -ru kicad.3493/include/appl_wxstruct.h kicad/include/appl_wxstruct.h
--- kicad.3493/include/appl_wxstruct.h	2012-04-08 03:24:18.653600000 +0200
+++ kicad/include/appl_wxstruct.h	2012-04-08 06:48:52.439995635 +0200
@@ -52,6 +52,7 @@
 class wxSingleInstanceChecker;
 class wxHtmlHelpController;
 
+extern bool g_CmdLineMode;
 
 /**
  * Class EDA_APP
@@ -185,6 +186,8 @@
      */
     void InitEDA_Appl( const wxString& aName, EDA_APP_T aId = APP_UNKNOWN_T );
 
+    virtual int OnRun() { return g_CmdLineMode ? 0 : wxApp::OnRun(); }
+
     /**
      * Function SetLanguage
      * sets the dictionary file name for internationalization.
diff -ru kicad.3493/include/wxBasePcbFrame.h kicad/include/wxBasePcbFrame.h
--- kicad.3493/include/wxBasePcbFrame.h	2012-04-08 03:24:18.653600000 +0200
+++ kicad/include/wxBasePcbFrame.h	2012-04-08 06:48:52.440995630 +0200
@@ -571,6 +571,7 @@
 
     bool ExportToDxfFile( const wxString& aFullFileName,
                           int             aLayer,
+                          bool            aPlotOriginIsAuxAxis,
                           EDA_DRAW_MODE_T aTraceMode );
 
     void Plot_Layer( PLOTTER*        plotter,
diff -ru kicad.3493/include/wxEeschemaStruct.h kicad/include/wxEeschemaStruct.h
--- kicad.3493/include/wxEeschemaStruct.h	2012-04-08 03:24:18.653600000 +0200
+++ kicad/include/wxEeschemaStruct.h	2012-04-08 06:48:52.442995618 +0200
@@ -595,6 +595,8 @@
     void SVG_Print( wxCommandEvent& event );
 
     // Plot functions:
+    void CmdLineToPlot_PS( bool PlotBW, bool PlotSheetRef );
+    void CmdLineToPlot_DXF( bool PlotBW, bool PlotSheetRef );
     void ToPlot_PS( wxCommandEvent& event );
     void ToPlot_HPGL( wxCommandEvent& event );
     void ToPlot_DXF( wxCommandEvent& event );
diff -ru kicad.3493/include/wxPcbStruct.h kicad/include/wxPcbStruct.h
--- kicad.3493/include/wxPcbStruct.h	2012-04-08 03:24:18.653600000 +0200
+++ kicad/include/wxPcbStruct.h	2012-04-08 06:48:52.445995601 +0200
@@ -74,6 +74,7 @@
 class PCB_EDIT_FRAME : public PCB_BASE_FRAME
 {
     friend class PCB_LAYER_WIDGET;
+    friend bool Pcbnew_CmdLine();
 
     void updateTraceWidthSelectBox();
     void updateViaSizeSelectBox();
diff -ru kicad.3493/common/confirm.cpp kicad/common/confirm.cpp
--- kicad.3493/common/confirm.cpp	2012-04-08 03:24:18.653600000 +0200
+++ kicad/common/confirm.cpp	2012-04-08 06:49:55.618649886 +0200
@@ -11,6 +11,8 @@
 #include <dialog_exit_base.h>
 #include <bitmaps.h>
 
+bool g_CmdLineMode = false;
+
 class DIALOG_EXIT: public DIALOG_EXIT_BASE
 {
 public:
@@ -42,6 +44,12 @@
 {
     wxMessageDialog* dialog;
 
+    if (g_CmdLineMode)
+    {
+        wxFprintf( stderr, text + _( "\n" ) );
+        return;
+    }
+
     if( displaytime > 0 )
         dialog = new wxMessageDialog( parent, text, _( "Warning" ),
                                       wxOK | wxCENTRE | wxICON_INFORMATION );
@@ -58,6 +66,12 @@
 {
     wxMessageDialog* dialog;
 
+    if (g_CmdLineMode)
+    {
+        wxPrintf( text + _( "\n" ) );
+        return;
+    }
+
     dialog = new wxMessageDialog( parent, text, _( "Info:" ),
                                   wxOK | wxCENTRE | wxICON_INFORMATION );
 
@@ -69,6 +83,12 @@
 void DisplayHtmlInfoMessage( wxWindow* parent, const wxString& title,
                              const wxString& text, const wxSize& size )
 {
+    if (g_CmdLineMode)
+    {
+        wxPrintf( title + _( "\n" ) + text + _( "\n" ) );
+        return;
+    }
+
     HTML_MESSAGE_BOX *dlg = new HTML_MESSAGE_BOX(parent,title, wxDefaultPosition, size );
     dlg->AddHTML_Text( text );
     dlg->ShowModal();
diff -ru kicad.3493/common/edaappl.cpp kicad/common/edaappl.cpp
--- kicad.3493/common/edaappl.cpp	2012-04-08 03:24:18.653600000 +0200
+++ kicad/common/edaappl.cpp	2012-04-08 06:48:52.448995586 +0200
@@ -306,6 +306,7 @@
     wxString EnvLang;
 
     m_Id = aId;
+if (!g_CmdLineMode)
     m_Checker = new wxSingleInstanceChecker( aName.Lower() + wxT( "-" ) + wxGetUserId() );
 
     /* Init KiCad environment