Well, I did some digging... and after breaking it a bit, I've figured it out. If you open taxonomy-portfolio_entries.php (make a backup of the original file in case something goes wrong!!) and look right after the header code. You should see:
if(empty($avia_config['portfolio_columns'])) $avia_config['portfolio_columns'] = "2 sidebar_left single_sidebar"; //Layout options: 3 sidebar_right, 2 sidebar_left single_sidebar, 3 sidebar_left, 1, 2, 3, 4
As is, this makes a sidebar on the left. You can replace it with 3 sidebar_right if you want a sidebar on the right. And if you want a 4 column layout just like the main portfolio page, you enter 1, 2, 3, 4.
Mine now looks like this:
if(empty($avia_config['portfolio_columns'])) $avia_config['portfolio_columns'] = "1, 2, 3, 4"; //Layout options: 3 sidebar_right, 2 sidebar_left single_sidebar, 3 sidebar_left, 1, 2, 3, 4
You can see the temp page (still under construction) at http://50.23.215.211/~agilardi/portfolio_entries/acting-coach/
** Still trying to figure out how to remove "Archive For:"
Hope this helps you out, Pentagonbooking.
All the Best,
Heather