Yeah when you signup for a new forum you will only see the Default style listed in the style picker. There are a few others you can install under Admin > Manage Styles. You can click on the thumbnails to install them.
BUT -
The Helios Red Style that is listed there is NOT the updated one (its the older version) so it would be best to grab it from the site I posted as it will match the others. To get the other Helious colors onto your forum you need to add them by creating a new style for each one, modifying that style and pasting in the css. The directions are listed on the link with each of the stylesheets. (at the link I gave you) If you decide to update them on your gem forum you can just modify the ones you already have installed and replace the existing css with the new css - and follow the directions for the header/footer code.
If you dont remember how to create/modify stylesheets this will help:
Admin CP Manage Styles GuideTip: You are going to need to refresh your browser after modifying any stylesheet. Also because the swapper(s) use scripts and all of the changing you will be doing it would be smart to also clear the cache in your browser, then refresh it once you get it all installed.
I'll check back here and there adn see how you are getting along. Gotta warn you though: football playoff day today and tomorrow and Im gonna be on the couch watching the games so I may be slow getting back to you.