I would start by going back to the SP supplied stacked theme and looking in spTopicView.php and see how it is done there.
IE:
sp_ColumnStart(‘tagClass=spInfoSection spLeft&width=30%&height=60px’);
sp_SectionStart(‘tagClass=spLeft’, ‘user-dates’);
echo ‘<span class=”spPostUserDate”>’.__sp(‘Last Visit’).’: </span>’;
sp_PostIndexUserDate(‘tagClass=spCenter spPostUserDate&stackdate=0’);
sp_PostIndexUserRegistered(‘tagClass=spPostUserRegistered spCenter’, __sp(‘Member Since: %DATE%’));
sp_PostIndexUserPosts(‘tagClass=spPostUserPosts spCenter’, __sp(‘Forum Posts: %COUNT%’));
sp_SectionEnd(”, ‘user-dates’);
sp_ColumnEnd();
You can then move the info around, up down or change the width of that column as needed to match your layout.
The code shown should show you something like this which sounds like what you are wanting.
Last Visit: December 19, 2011 – 9:03 pm
Member Since: September 12, 2011
Forum Posts: 10
From there you could add this just about anywhere in spTopicView.php
echo ‘<span class=”spPostUserDate”>’.__sp(‘Last Visit’).’: </span>’;
sp_PostIndexUserDate(‘tagClass=spCenter spPostUserDate&stackdate=0’);