[Merriweather]

Thanks to everyone who took the time to post their knowledge in this thread. I just got my vB 4.1.12 working with the hacked "Likes" system pretty easily.

However, I use this Lightweight style for mobile device users: https://vborg.vbsupport.ru/showthread.php?t=249277

So far, I've added the "Like" button in between the "Edit" and "Reply" on my mobile style, like this:

<vb:if condition="$post['editlink']"><a id="btn" href="{vb:raw post.editlink}">{vb:rawphrase edit}</a></vb:if>

<!-- Add "Like" button to mobile style -->
<a id="btn" href="post_thanks.php?{vb:raw session.sessionurl}do=post_thanks_add&amp;p={vb:raw post.postid}&amp;securitytoken={vb:raw bbuserinfo.securitytoken}">{vb:rawphrase post_thanks_thanks}</a>
<!-- End adding "Like" button -->

<vb:if condition="$post['replylink']"><a id="btn" href="{vb:raw post.replylink}" id="qrwq_{vb:raw post.postid}" rel="nofollow">{vb:rawphrase reply}</a></vb:if>

Basically, all I need are the conditionals to wrap around it so it won't show to users who don't have access to the post. I've been trying (without success) to create my own conditionals.