how to make reply-link({$l_menu[7]}=I dont want this in the header menu) in main_posts.html
and
start-new-topic-link on main_topics.html?

And how do I change the behaviour of the header menu?

Thanks in forward

We do not provide free support on customizing templates, sorry.
In addition, I'm not quite sure what do you mean with above. Very poor English and explanation.

Here's how to find where to edit this or that.

thanks for the support.
what I meant was, that I wanted to change the menu in the header: forum . reply. profile. etc..

I solved this by using comment mark in the header template as follows:
<!-- forum . reply. profile. etc.. -->

now i can put my own links on the header.