You need to create a cpnav xml file for your product. This is done by creating a file in includes/xml called cpnav_yourproductid.xml The contents of the file define the admincp menus heres an example from one of my products:
Code:
<?xml version="1.0" encoding="ISO-8859-1"?>
<navgroups product="imhotek_pbpgaming" master="true">
<navgroup phrase="imhotek_pbpgaming_menu" displayorder="25">
<navoption displayorder="1">
<phrase>imhotek_pbpgaming_main</phrase>
<link>pbpgadmin.php</link>
</navoption>
</navgroup>
</navgroups>