Update README.md

README.md

@@ -27,6 +27,11 @@ The necessary HW/SW inventory data can be created with my CDP/LLDP/IPv4 inventor
 Andreas Boesl and schnetz for the Network visualization plugin\
 detlev[dot]gerke[at]siegfried[dot]ch, who was my beta tester ;-)
 
+---
+### HOWTO
+
+For first steps on howto use the Network Visualization Data Creation Tool (NVDCT) set the [HOWTO](HOWTO.md).
+
 ---
 ### Download