OK, I got tongue in cheek excercise to play. Go back through <your memories of> Dark Heresy archetypes and establish EVERYTHING of significance the way they do in Death Watch that is to say, everthing MUST have an an in game effect.
You starter for 10;
The Infantry Mans Uplifting Primer.
This blessed tome is given to all of the Imperial Guard, it contains much usefull information on survival and combat situations. It takes 4 turns to refference the book, there after the character may add +10 to any one roll from the following list; Survival, Any Tactics, Common Lore: War, Forbidden Lore:Xenos.
Mercenary License
You are a powerful free warrior sort out by all, this license proves this. Add +5 to fellowship tests with Government and Military personell.