Any deck that has indexes in the upper-left will work for omaha. If you want one of my decks for free, you will have to search this thread. And it will have to be a complete set of all 8 images. I used to have them all on a free Wikipedia page, but not anymore. The majority of my newest decks, wont be available in this thread, as a complete set. I took down all the links that lead to ZIP packages of complete decks.
My decks and table package are now available for sale at PSThemes.com in the
Full Tilt by Fozzy section. They now come in a Self-Extracting Installer file for no-hassle installation.
If you want something from PSThemes, send me (Fozzy) a PM in the forums there.