1. names
I suggest you to read my thread at ofpec's Editing/Scripting: Multiplayer forum, title: Problems with co-op team names.
Shure You will find the answer for your first Q
2. objectives
Your breafing.html file must contain these lines:
<p><a name = "OBJ_1"></a>WRITE HERE OBJECTIVE DESCRIPTION1.
</p>
<hr>
<p><a name = "OBJ_2"></a>WRITE HERE OBJECTIVE DESCRIPTION2.
</p>
<hr>
<p><a name = "OBJ_3"></a>WRITE HERE OBJECTIVE DESCRIPTION3.
By execute any of these commands below with a trigger or a script you can mark your objectives completed:
"1" objStatus "DONE"
"2" objStatus "DONE"
"3" objStatus "DONE"