(edit: ignore my craptacular stupidity for not noticing the answer was already partly posted in another thread, did not se it till after i posted this :S.)
NOTE: im not trying to hijack the thread, i just want to end this spam.
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Impulse are you talking about the skull and crossbones from this screenshot?

If so it is not in tremulous yet (i think correct me if im wrong anyone), you could hax it up if you wanted to but to my current knowledge you would not be able to play on most servers (pure client issues because of extra files)
So just drop it for now and make due with what you can. (or wait till trem 1.2?)