Change the directory of pgn4web from '_assets' to static 'assets'.

assets/vendor/pgn4web/viewer-preset-URLs.php

@@ -0,0 +1,25 @@
+<?php
+
+/*
+ *  pgn4web javascript chessboard
+ *  copyright (C) 2009-2012 Paolo Casaschi
+ *  see README file and http://pgn4web.casaschi.net
+ *  for credits, license and more details
+ */
+
+/*
+ *  add preset URLs for the viewer.php form using the following template
+ *  the javascript code string should be the body of a function returning the preset PGN URL string
+ *
+ *  addPresetURL($label, $javascriptCode);
+ *  addPresetURL('games of the month', 'var nowDate = new Date(); var nowMonth = nowDate.getMonth() + 1; if (nowMonth < 10) { nowMonth = "0" + nowMonth; } return "http://example.com/folder/gotm" + nowDate.getFullYear() + nowMonth + ".pgn";');
+ *
+ */
+
+
+/* start of preset URLs */
+
+/* end of preset URLs */
+
+
+?>