You can install the opera channel if you have twilight hack running. You can use Wad Manager either through TP hack or Homebrew Channel. You just have to get the wad. I believe theres a thread on where to download from.
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I just linked the rapidshare to the US version of the opera channel (Hope its ok with u Mods) that i found from this thread ->
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This forum is super great and theres lots of good tut that will help you install Wads Just look around.
Hope this answers your question.