Change navigation menu

How do I go about changing the navigation ui bar?

I was looking though the old forums and found this page which is exactly what I want to do but cant seem to do it on oC 9.1.4.

I would also like to change the help page and have it redirect the user to another site, is this possible, if so what do I need to mody in order to accomplish this?

There are two apps that make changes to the navigation bar, perhaps you can get some inspiration from there: