Index: trunk/package/Distribution
===================================================================
--- trunk/package/Distribution	(revision 1738)
+++ trunk/package/Distribution	(revision 1739)
@@ -2,10 +2,7 @@
 
 <installer-gui-script minSpecVersion='1'>
 
-	<options
-		hostArchitectures='i386'
-	/>
-
+	<options hostArchitectures='i386' allow-external-scripts="no"/>
 	<domains enable_anywhere="true"/>
 
 	<welcome file='Welcome.rtfd'/>
@@ -48,5 +45,9 @@
 		toggle.selected = ( my.choice.selected != "false" ? "false" : "true" );
 		return ( toggle.selected != false ? false : true );
 	}
-	
-	</script>
+
+	function chameleon_boot_plist_exists() {
+		return system.files.fileExistsAtPath(my.target.mountpoint + '/Extra/org.chameleon.Boot.plist');
+	}
+
+    </script>
Index: trunk/package/buildpkg.sh
===================================================================
--- trunk/package/buildpkg.sh	(revision 1738)
+++ trunk/package/buildpkg.sh	(revision 1739)
@@ -106,7 +106,7 @@
 		mkdir -p ${1}/Upgrade/Root
 		echo "" > "${1}/Upgrade/Root/install_type_upgrade"
 		echo "	[BUILD] Upgrade "
-		buildpackage "${1}/Upgrade" "/$chamTemp" "" "start_selected=\"false\" selected=\"exclusive(choices['New'])\"" >/dev/null 2>&1
+		buildpackage "${1}/Upgrade" "/$chamTemp" "" "start_selected=\"chameleon_boot_plist_exists()\" selected=\"exclusive(choices['New'])\"" >/dev/null 2>&1
 	# End build upgrade package
 
    ((xmlindent--))