You can always find the template by doing this - vboptions > General Settings > Add Template Name in HTML Comments > set to Yes . Then go back to your page and view the source code and you will see the name of the template called around your part of the code. Sometimes the template is the one mentioned at the very top of the page source.
As for the whole menu, have you looked at the usercp.php page? Have you thought of just using a hook in the usercp.php page for your page and adding it all by plugin - adding a new do=whatever?
Great tomorrow I'll try and let you know.
tnx for your help
NO, thats a tutorial, but you need here also a plugin, because all the menuitems are in an array, because of the color(activ item have another color then the others)