Spoike, shinma72, if you're willing to try your hand at writing those core mechanics, I'm glad to help you through the process. I'd recommend you start by scanning the authoring kit wiki at
http://hlkitwiki.wolflair.com/index.php5/Main_Page, especially the Savage Worlds Walkthrough in the Authoring Examples section.
Also, examine the various game systems in Hero Lab, even opening the ones you don't own in demo mode. Try out various mechanics, thinking about how you'd make use of them in the Dark Heresy files. I'd recommend importing some of the pre-made characters within Cortex, Savage Worlds, or WoD, and then looking at how the advancement tab works in those systems. That sort of advancement mechanism is how the XP spending in Dark Heresy will be handled. The core mechanics for advancement are already present in the Skeleton files, so examine those systems with an eye towards how advancement would be used in DH.