You can access to template manager with the top menu : "Extensions --> Template Manager --> joomspirit_18 "
With "joomspirit_18 template", you can :
Example : for display the nav_main on the top of site, publy your menu and assign it with position "menu".
The position must be : "menu" and with the id : "main_menu" :
For obtain this, the parent item must be a link (for article or component) or a "separator item".
In this template, I've choose to display it with an image. If you have Fireworks, you can open "logo_fireworks.png" in images_sources directory. If not, you have another file in this directory : "logo.jpg" . Open it in your picture software, and place your text or logo above. For finish, save your file as "logo.jpg" in images directory of this template. Very simple !!
If you want change the background of tooltips, change the "bubble.png" in images directory of this template.