diff --git a/media/extra_grf/assemble_nfo.awk b/media/extra_grf/assemble_nfo.awk
new file mode 100644
--- /dev/null
+++ b/media/extra_grf/assemble_nfo.awk
@@ -0,0 +1,32 @@
+# $Id$
+
+# This file is part of OpenTTD.
+# OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+# OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+
+BEGIN {
+	# Very basic variant function; barely any error checking.
+	# Just use the first argument as the file to start from when assembling everything
+	path = ARGV[1];
+	gsub("[^/\\\\]*$", "", path);
+	assemble(ARGV[1]);
+}
+
+# Recursive function for assembling by means of resolving the #includes.
+function assemble(filename) {
+	while ((getline < filename) > 0) {
+		if (NF == 2 && $1 == "#include" ) {
+			# Remove the quotes.
+			gsub("[\"'<>]", "", $2);
+			assemble(path $2);
+		} else {
+			print $0;
+		}
+	}
+
+	if (close(filename) < 0) {
+		print "Could not open " filename > "/dev/stderr";
+		exit -1;
+	}
+}