[SOLVED] Show SubCategories on the navigation menu

Hello all,

Finally I have a proper e-commerce project so I'm working to use OpenCart for it.
At the moment I'm trying to get the subcategories into the main navigation menu. I saw this was asked before by Tom but no solution was given.
Hints on how to achieve this will be most welcomed.

Tunox

EDIT: Browsing the forums I see there are 2 solutions HERE and HERE