Advanced Dark Heresy 2.5 Rewritten Rules

From the introduction:

This document is completely unofficial and in no way endorsed by Games Workshop Ltd., Fantasy Flight Games or Cubicle 7 Entertainment.
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Dark Heresy is set into an appealing world of grim future. The original mechanics however become unsatisfying very soon as the combat, investigation, items, psychic powers and careers do not answer to those expectations the lore of the Warhammer 40,000 sets around them.
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As it seems to be an easy mistake to make, I'd like to point out that despite the version number being 2.5, this system is not based on Dark Heresy (2nd Edition) except for some concepts being adapted also from that system. Instead, this system in whole is purely build from [a] base of Dark Heresy (1st Edition).