For those of you who don't know, Cortex is a system designed to highlight the interpersonal drama of universes like Firefly and BSG. Attributes are expressed in terms of dice, and most rolls are resolved as a paired attribute / skill roll attempting to beat a static difficulty. It's light on crunch and heavy on drama, with a system that rewards in-character flaws with plot points that can be exchanged for bonuses to dice rolling or to make minor (or not-so-minor) edits to the story. I rather like it. So much so that I've been playing around with making some resources for the game.
Colonial flags and rank pips can be found at the BSG Wiki. If you want to photoshop an actor into a BSG uniform, you're on your own. (One of the things our GM does is say which actor might play which PC/NPC. I rather like it.)
As I'm playing a pilot, I looked through some of the prop websites and found some neat documents that I've recreated. I have Viper and Raptor pre-flight checklists.
Here are some repair orders for Raptors and for Vipers.