diff --git a/install-dev/theme/js/configure.js b/install-dev/theme/js/configure.js
index 0232e2a1e..98a647702 100644
--- a/install-dev/theme/js/configure.js
+++ b/install-dev/theme/js/configure.js
@@ -14,15 +14,28 @@ $(document).ready(function()
 			data: 'timezoneByIso=true&iso='+iso,
 			dataType: 'json',
 			cache: true,
-			success: function(json)
-			{
-				if (json.success)
+			success: function(json) {
+				if (json.success) {
 					$('#infosTimezone').val(json.message).trigger("liszt:updated");
+					if (in_array(iso, ['us','ca','ru','me','au','id']))
+						$('#timezone_div').show();
+					else
+						$('#timezone_div').hide();
+				}
 			}
 		});
 	});
 });
 
+function in_array(needle, haystack) {
+    var length = haystack.length;
+    for (var i = 0; i < length; i++) {
+        if (haystack[i] == needle)
+			return true;
+    }
+    return false;
+}
+
 /**
  * Upload a new logo
  */
diff --git a/install-dev/theme/views/configure.phtml b/install-dev/theme/views/configure.phtml
index 0861bd78c..5b1c7b98a 100644
--- a/install-dev/theme/views/configure.phtml
+++ b/install-dev/theme/views/configure.phtml
@@ -70,7 +70,7 @@ var default_iso = '<?php echo $this->session->shop_country ?>';
 	</div>
 
 	<!-- Timezone list -->
-	<div class="field clearfix">
+	<div id="timezone_div" class="field clearfix" <?php if (!in_array($this->session->shop_timezone, array('us','ca','au','ru','me','id'))) echo 'style="display:none"'; ?>>
 		<label for="infosTimezone" class="aligned"><?php echo $this->l('Shop timezone:') ?></label>
 		<div class="contentinput">
 			<select name="shop_timezone" id="infosTimezone" class="chosen">
diff --git a/install-dev/theme/views/header.phtml b/install-dev/theme/views/header.phtml
index b80b0d469..7c7ca2139 100644
--- a/install-dev/theme/views/header.phtml
+++ b/install-dev/theme/views/header.phtml
@@ -72,7 +72,7 @@
 		<?php endforeach; ?>
 	</ol>
 	<?php if (@fsockopen('api.prestashop.com', 80, $errno, $errst, 3)): ?>
-		<iframe scrolling="no" style="height:200px;width:160px;border:none;margin-top:20px"
+		<iframe scrolling="no" style="height:160px;width:160px;border:none;margin-top:20px"
 			src="https://api.prestashop.com/iframe/install.php?step=<?php echo $this->step ?>&lang=<?php echo $this->language->getLanguageIso() ?>&country=<?php echo $this->session->shop_country ?>">
 			<p><?php echo $this->l('Contact us!') ?><br /><?php echo $this->getPhone() ?></p>
 		</iframe>
@@ -85,7 +85,6 @@
 	<div id="sheet_<?php echo $this->step ?>" class="sheet shown clearfix">
 	<div class="contentTitle">
 		<h1><?php echo $this->l('Installation Assistant') ?></h1>
-
 		<ul id="stepList_1" class="stepList clearfix">
 			<?php foreach ($this->getSteps() as $step): ?>
 				<li <?php if ($this->isStepFinished($step)): ?>class="ok"<?php endif; ?>><?php echo $this->l('menu_'.$this->step) ?></li>