Well I already explained it a bit but here some more detailed instructions. It is a bit primitive but it works
download the last reply alert mod
here.
follow step 1
step 2 can be skipped if you only want to disable quickreply.
then edit the vB SHOWTHREAD template:
find the following:
Code:
<if condition="$show['quickreply'] OR $show['ajax_js']">
<!-- ajax errors table -->
before add:
Code:
<if condition="$show[closethread] AND $last_reply_alert_phrase">
<span class="highlight"><br />Quick reply disabled</span>
<else />
_______________________________
find:
Code:
<!-- end quick reply -->
</if>
after add:
________________________________
And you are done, I didn't use the more advanced options of the mod and just typed the text I wanted into the code. Simply because I am not sure how to do this properly.