Help : a modification to do

[winky8300]

hello

I was given a small modification to add information in all the first posts of the forum
there she is

PHP Code:

<vb:if condition="$thread['firstpostid'] != $post['postid']"><vb:else />
<vb:if condition="in_array(THIS_SCRIPT, array('index', 'forumdisplay', 'showthread'))">   <div class="demo">welcome to forum!</div></vb:if></vb:if> 

but I want the message to appear at the beginning of each first message and not at the end of the message.
can someone help me to modify this code please