diff --git a/bin/leonardo2kmz.py b/bin/leonardo2kmz.py
index 1598389..3226f5e 100755
--- a/bin/leonardo2kmz.py
+++ b/bin/leonardo2kmz.py
@@ -68,6 +68,8 @@ def main(argv):
     parser.add_option('-u', '--url', metavar='URL', help='set URL')
     parser.add_option('-d', '--directory', metavar='PATH', help='set directory')
     parser.add_option('-e', '--engine', metavar='URL', help='set engine')
+    parser.add_option('-z', '--tz-offset', metavar='HOURS', type='int',
+                      help='set timezone offset')
     parser.add_option('--debug', action='store_true',
                       help='enable pretty KML output')
     parser.set_defaults(output='igc2kmz.kmz')
@@ -76,6 +78,7 @@ def main(argv):
     parser.set_defaults(url=DEFAULT_URL)
     parser.set_defaults(directory=DEFAULT_DIRECTORY)
     parser.set_defaults(engine=DEFAULT_ENGINE)
+    parser.set_defaults(tz_offset=0)
     parser.set_defaults(debug=False)
     options, args = parser.parse_args(argv)
     #
@@ -176,7 +179,8 @@ def main(argv):
         #
         flights.append(flight)
     #
-    kmz = flights2kmz(flights, roots=[screen_overlay])
+    kmz = flights2kmz(flights, roots=[screen_overlay],
+                      tz_offset=options.tz_offset)
     kmz.write(options.output, '2.2', debug=options.debug)
 
 if __name__ == '__main__':
diff --git a/igc2kmz/__init__.py b/igc2kmz/__init__.py
index ace3056..04c8029 100644
--- a/igc2kmz/__init__.py
+++ b/igc2kmz/__init__.py
@@ -39,9 +39,7 @@ INFINITY = unicodedata.lookup('INFINITY').encode('utf_8')
 MULTIPLICATION_SIGN = unicodedata.lookup('MULTIPLICATION SIGN').encode('utf_8')
 UP_TACK = unicodedata.lookup('UP TACK').encode('utf_8')
 
-IMAGES_DIR = os.path.normpath(os.path.join(os.path.dirname(__file__),
-                                           '..',
-                                           'images'))
+BASE_DIR = os.path.normpath(os.path.join(os.path.dirname(__file__), '..'))
 
 
 def make_table(rows, bgcolors='#dddddd #ffffff'.split()):
@@ -188,15 +186,17 @@ class Stock(object):
                                    line_style)
         self.kmz.add_roots(self.xc_style2)
         #
-        self.pixel_url = os.path.join(IMAGES_DIR, 'pixel.png')
-        self.kmz.add_files({self.pixel_url: open(self.pixel_url).read()})
+        self.pixel_url = os.path.join('images', 'pixel.png')
+        pixel = open(os.path.join(BASE_DIR, self.pixel_url)).read()
+        self.kmz.add_files({self.pixel_url: pixel})
         #
         self.visible_none_folder = self.make_none_folder(1)
         self.invisible_none_folder = self.make_none_folder(0)
         #
-        animation_icon_url = os.path.join(IMAGES_DIR, 'paraglider.png')
+        animation_icon_url = os.path.join('images', 'paraglider.png')
         self.animation_icon = kml.Icon(href=animation_icon_url)
-        files = {animation_icon_url: open(animation_icon_url).read()}
+        animation_icon = open(os.path.join(BASE_DIR, animation_icon_url)).read()
+        files = {animation_icon_url: animation_icon}
         self.kmz.add_files(files)