As for skills, well I figure that the First Ones are so mysterious that it *should* be tricky to get enough skill points to know much.
However, I would suggest either Knowledge (shadows) since the team found some Shadowtech in the last adventure, or Knowledge (First Ones) which would include a bit on Vorlons and Shadows, but in less detail, to cover all bases. The original aim was to try to find anything created by the Tal-Kona'Sha that might be useful, and the Tal's are *almost* First One status.
I would suggest introducing Croft in the IC thread too. He's evidently late for the briefing, my guess would be that he's been on Renaasha station for a little while rather than come in on Whitestar 96, but is still supposed to be joining the crew of the Outrageous Fortune.