Recently I was listening to Gianyi Thakur Singh Jee katha about Mool Mantra. It took Gianyi Jee few weeks just to explain the meaning of EKONKAR...and i will strongly recommend anyone who is interested to check out http://www.gurmatveechar.com/katha.php?k=gts,
and to order complete set go to http://www.gurbanisewa.com/cdinfo.html,

Dhan Dhan Waheguru Jee