Federation Commander

Could someone please remind me what that scenario's called (and where it is) where there's a hidden-placed ship in an asteroid field, and the other player has to stooge around the asteroid field looking for something - then the hidden player reveals his ship when he's ready?

Or is it just an SFB scenario, in which case the same question applies.

I don't know of the scenario you're referring to.

There is a scenario The Stasis Box, which features a Fed & Kzinti trying to locate an object hidden in an asteroid field. There's another scenario with a Gorn battlecruiser ambushed by hidden Romulans...

In CL36 there was a scenario called Race Against Time in which Kzinti and Klingon ships clashed in an asteroid field because there was a Klingon research team with vital information trapped on one of the asteroids. No one knew where the team was located. They had to be found first, then rescued (by the Klingons) or captured (by the Kzintis).

That isn't exactly what you said you were looking for, though.