If Star Trek is set in an alternate future, and Steampunk is set in an alternate past, shouldn't a "Steampunk Star Trek" be set in the middle of both, ie the present? Although I guess people would confuse it with regular photographs of the Star Trek cast...
This looks like a bunch of old photographs with swapped out heads. Where's the "Steampunk"?
--- Spock to Edith Keeler, "The City on the Edge of Forever"