That's something you're not likely to get help with on this forum. Themes are an easy way to brick your console, and no one here wants to help you do that. The information which exists for themes on this board is kept very limited in part because of their unreliable nature, as well as the high percentage of users who end up in the bricked section.
If you have other questions, I and many others here are happy to help if we can. Here's a great list of things to watch out for so you can keep your console in healthy shape. Happy Wii'ing.