diff --git a/enex2kml.pl b/enex2kml.pl
index a59525f..8750828 100644
--- a/enex2kml.pl
+++ b/enex2kml.pl
@@ -1,4 +1,17 @@
 #!/usr/bin/perl -w
+#
+# This script converts the XML export file from Evernote to a
+# kml file for use with Google Earth.
+# 
+# (c) 2013 by Marcus J. Ertl (http://www.colorful-sky.de/)
+#
+# This script is free to use and modify under the Creative Commones
+# Attribution-ShareAlike 3.0 Unported License. For more about this license
+# please visit http://creativecommons.org/licenses/by-sa/3.0/deed.de
+#
+# This script is shared without any support or warranty.
+# Just use it on your own risk.
+
 use strict;
 use Encode;
 use Getopt::Long;
@@ -10,106 +23,146 @@ my $outFile = '';
 my $verbose = 0;
 my $showSkipped = 0;
 my $foldername = 'Evernote';
+my $help = 0;
 
 GetOptions( 'i|input=s' => \$inFile,
 			'o|output=s' => \$outFile,
 			'v|verbose' => \$verbose,
 			's|showSkipped' => \$showSkipped,
-			'f|folder=s' => \$foldername);
+			'f|folder=s' => \$foldername,
+			'h|help' => \$help);
 
-my $count = 0;
-my $exported = 0;
+if ($help || $inFile eq '' || $outFile eq '') {
+	printHelp();
+} else {
+	my $count = 0;
+	my $exported = 0;
 
-my $parser = XML::LibXML->new();
-my $notes = $parser->parse_file($inFile);
+	my $parser = XML::LibXML->new();
+	my $notes = $parser->parse_file($inFile);
 
-my $kml = XML::LibXML::Document->new('1.0', 'utf-8');
-my $root = $kml->createElement('kml');
-$root->setAttribute('xmlns'=> 'http://www.opengis.net/kml/2.2');
-my $document = $kml->createElement('Document');
-my $folder = $kml->createElement('Folder');
-my $name = $kml->createElement('name');
-$name->appendTextNode($foldername);
-$root->appendChild($document);
-$folder->appendChild($name);
-$kml->setDocumentElement($root);
+	my $kml = XML::LibXML::Document->new('1.0', 'utf-8');
+	my $root = $kml->createElement('kml');
+	$root->setAttribute('xmlns'=> 'http://www.opengis.net/kml/2.2');
+	my $document = $kml->createElement('Document');
+	my $folder = $kml->createElement('Folder');
+	my $name = $kml->createElement('name');
+	$name->appendTextNode($foldername);
+	$root->appendChild($document);
+	$folder->appendChild($name);
+	$kml->setDocumentElement($root);
 
-my $style = $kml->createElement('Style');
-$style->setAttribute('id' => 'done_style');
-my $iconStyle = $kml->createElement('IconStyle');
-$style->appendChild($iconStyle);
-my $scale = $kml->createElement('scale');
-$scale->appendTextNode('1.3');
-$iconStyle->appendChild($scale);
-my $icon = $kml->createElement('Icon');
-$iconStyle->appendChild($icon);
-my $href = $kml->createElement('href');
-$href->appendTextNode('http://maps.google.com/mapfiles/kml/pushpin/grn-pushpin.png');
-$icon->appendChild($href);
-my $hotspot = $kml->createElement('hotSpot');
-$hotspot->setAttribute('x', '20');
-$hotspot->setAttribute('y', '2');
-$hotspot->setAttribute('xunits', 'pixels');
-$hotspot->setAttribute('yunits', 'pixels');
-$icon->appendChild($hotspot);
+	my $style = $kml->createElement('Style');
+	$style->setAttribute('id' => 'done_style');
+	my $iconStyle = $kml->createElement('IconStyle');
+	$style->appendChild($iconStyle);
+	my $scale = $kml->createElement('scale');
+	$scale->appendTextNode('1.3');
+	$iconStyle->appendChild($scale);
+	my $icon = $kml->createElement('Icon');
+	$iconStyle->appendChild($icon);
+	my $href = $kml->createElement('href');
+	$href->appendTextNode('http://maps.google.com/mapfiles/kml/pushpin/grn-pushpin.png');
+	$icon->appendChild($href);
+	my $hotspot = $kml->createElement('hotSpot');
+	$hotspot->setAttribute('x', '20');
+	$hotspot->setAttribute('y', '2');
+	$hotspot->setAttribute('xunits', 'pixels');
+	$hotspot->setAttribute('yunits', 'pixels');
+	$icon->appendChild($hotspot);
 
-$document->appendChild($style);
-$document->appendChild($folder);
+	$document->appendChild($style);
+	$document->appendChild($folder);
 
-foreach my $note ($notes->findnodes('/en-export/note')) {
-	my($title) = $note->findnodes('./title');
-	my($lat) = $note->findnodes('./note-attributes/latitude');
-	my($long) = $note->findnodes('./note-attributes/longitude');
+	foreach my $note ($notes->findnodes('/en-export/note')) {
+		my($title) = $note->findnodes('./title');
+		my($lat) = $note->findnodes('./note-attributes/latitude');
+		my($long) = $note->findnodes('./note-attributes/longitude');
 
-	my @t = $note->findnodes('./tag');
-	my @tags = ();
-	my $done = "No";
-	foreach my $tag (@t) {
-		push(@tags, $tag->to_literal);
-		if ($tag->to_literal eq "Done") {$done = "Yes";}
+		my @t = $note->findnodes('./tag');
+		my @tags = ();
+		my $done = "No";
+		foreach my $tag (@t) {
+			push(@tags, $tag->to_literal);
+			if ($tag->to_literal eq "Done") {$done = "Yes";}
+		}
+
+		if ($verbose && $lat && $long) {
+			print encode_utf8($title->to_literal), "\n";
+			print "\tlatitude:\t", $lat->to_literal, "\n";
+			print "\tlongitude:\t", $long->to_literal, "\n";
+			print "\ttags:\t".join(', ', @tags)."\n";
+			print "\tdone:\t", $done, "\n";
+		}
+
+		$count++;
+
+		if ($lat && $long && $lat->to_literal != 0 && $long->to_literal != 0) {
+			$exported++;
+
+			my $place = $kml->createElement('Placemark');
+			my $name = $kml->createElement('name');
+			$name->appendTextNode($title->to_literal);
+
+			my $point = $kml->createElement('Point');
+			my $coord = $kml->createElement('coordinates');
+			$coord->appendTextNode($long->to_literal.','.$lat->to_literal.',0');
+			$point->appendChild($coord);
+			my $styleurl = $kml->createElement('styleUrl');
+			$styleurl->appendTextNode('#done_style');
+			
+			$place->appendChild($name);
+			if ($done eq 'Yes') { $place->appendChild($styleurl); }
+			$place->appendChild($point);
+			$folder->appendChild($place);
+		} elsif ($showSkipped) {
+			print encode_utf8("Skipped: ".$title->to_literal."\n");
+		}
 	}
 
-	if ($verbose && $lat && $long) {
-		print encode_utf8($title->to_literal), "\n";
-		print "\tlatitude:\t", $lat->to_literal, "\n";
-		print "\tlongitude:\t", $long->to_literal, "\n";
-		print "\ttags:\t".join(', ', @tags)."\n";
-		print "\tdone:\t", $done, "\n";
-	}
 
-	$count++;
+	open KMLOUT, ">", $outFile or die $!;
+	print KMLOUT $kml->toString(1);
+	close KMLOUT;
 
-	if ($lat && $long && $lat->to_literal != 0 && $long->to_literal != 0) {
-		$exported++;
-
-		my $place = $kml->createElement('Placemark');
-		my $name = $kml->createElement('name');
-		$name->appendTextNode($title->to_literal);
-
-		my $point = $kml->createElement('Point');
-		my $coord = $kml->createElement('coordinates');
-		$coord->appendTextNode($long->to_literal.','.$lat->to_literal.',0');
-		$point->appendChild($coord);
-		my $styleurl = $kml->createElement('styleUrl');
-		$styleurl->appendTextNode('#done_style');
-		
-		$place->appendChild($name);
-		if ($done eq 'Yes') { $place->appendChild($styleurl); }
-		$place->appendChild($point);
-		$folder->appendChild($place);
-	} elsif ($showSkipped) {
-		print encode_utf8("Skipped: ".$title->to_literal."\n");
-	}
+	my $skipped = $count-$exported;
+	print "\ninput:\t$inFile\n";
+	print "output:\t$outFile\n";
+	print "Notes read:\t$count\n";
+	print "Notes exported:\t$exported\n";
+	print "Notes skipped:\t".$skipped."\n";
 }
 
+sub printHelp {
+	print <<"EOT";
 
-open KMLOUT, ">", $outFile or die $!;
-print KMLOUT $kml->toString(1);
-close KMLOUT;
+\033[1menex2kml.pl
+===========\033[0m
 
-my $skipped = $count-$exported;
-print "\ninput:\t$inFile\n";
-print "output:\t$outFile\n";
-print "Notes read:\t$count\n";
-print "Notes exported:\t$exported\n";
-print "Notes skipped:\t".$skipped."\n";
+This script converts the XML export file from Evernote to a
+kml file for use with Google Earth.
+
+(c) 2013 by Marcus J. Ertl (http://www.colorful-sky.de/)
+
+This script is free to use and modify under the Creative Commones
+Attribution-ShareAlike 3.0 Unported License. For more about this license
+please visit http://creativecommons.org/licenses/by-sa/3.0/deed.de
+
+\033[1mUsage\033[0m
+   enex2kml.pl -i inputfile.enex -o outputfile.kml ...
+
+\033[1mParameters\033[0m
+   i|input          file to read
+   o|output         file to write/overwrite
+   v|verbose        show more infos
+   s|showSkipped    show skipped entries
+   f|folder         foldername in kml/Google Earth
+   h|help           show this help
+
+Google Earth and Evernote are Trademarks of their respective owners.
+
+This script is shared without any support or warranty.
+Just use it on your own risk.
+
+EOT
+}