If you want to add it to only your main forum page you'd edit the FORUMHOME template instead. I'd recommend finding the code:
And Below this adding:
Code:
<div id="mytweetbutton" align="right" style="height:30px;">
<a href="http://twitter.com/share" class="twitter-share-button" data-count="horizontal" data-via="YOUR_TWITTER_USERNAME">Tweet</a><script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>
</div>
So you would not need the conditionals, correct.
Note- if you have the VB4 Suite and want to add it to your main page of the suite you'd have to edit some other template- I don't have the Suite so I can't help you with that.