Download the beta here. The only one that works with being in the rom is so outdated and to be honest, pretty bad compared to the beta one. Reason theres 2 different threads is because this is updated and I'm no longer on Team GRD. As I'm not on the team anymore I didn't feel it should be posted in their section. Anyways, I think the only one that doesnt work is Gingerbread with Transitions. However, if you do flash a fission theme you'll lose Wycontacts and a few other things, depending on how complete the theme is.