I was able to get this to work in vb4 .. I just used the following code in my postbit template:
Code:
<vb:if condition="$post['replylink'] && THIS_SCRIPT == 'private'">
<a id="qrwqa_{vb:raw post.postid}" class="newreply" href="{vb:raw post.replylink}&r=all" rel="nofollow" ><img id="quoteimga_{vb:raw post.postid}" src="{vb:stylevar imgdir_button}/trans_40b.png" alt="{vb:rawphrase reply_with_quote}" /> Reply to All</a>
<span class="seperator"> </span>
</vb:if>
Otherwise, I think the installation instructions should work OK. Heck, it might even work as suggested in the installation instructions. I just utilized the 'reply' code in vb4 with a slight modification for 'all'