Need help making a proper 40K mod

[TrashMan]

Heya.
I'm the guy who made the Astartes mod, and I've also been collecting old abandoned 40K mods.
I really want to do a proper mod, but I'm gonna need some help on that.
Wile I do have tons of modding experience, my time is very limited (and I haven't touched C++ in decades)

First and foremost, I have to know what is possible to achieve with xml and for what I'm going to need my own .dll's.
Naturally, the biggest issues is the astartes and their gene-seed.
http://warhammer40k.wikia.com/wiki/Gene-seed

So help me out here:

1. Secondary Heart  - simpe enough trough xml
2. Ossmodula - skeletal enhancements and fusion of ribs into a plate, bones become tougher than steel - how to simulate this in-game? Can an organ grant damage resistance? Can it increase work speed?
3. Biscopea - increases muscle growth and density. Works in tandem with Ossmodula.
4. Haemastamen - makes blood more efficient at carrying oxygen
5. Larraman's Organ - increases regeneration, reduces bleeding
6. Catalepsean Node - vastly recudes the need for sleep (The longest any Space Marine has ever been on active combat duty without rest is 328 hours)
7. Preomnor - esentailly a pre-stomach that allows Space Marines to eat otherwise poisonous or completely indigestible materials
8. Omophagea - this one probably can't be implemented in any meaningful fashion (eating dead enemeis gives random skill XP?)
9. Multi-lung - third, super-eficient lung that can filter poisonous gases
10. Occulobe - improved vision, night-vision
11. Lyman's Ear - improved hearing, immunity to vertigo or disorientation
12. Sus-an Membrane - allows a marine to put himself in suspended animation in case of severe trauma (537 years, longest known sleep). Basically self-stasis
13. Melanochrome - radiaton resistance, affects skin pigmentation
14. Oolitic Kidney - can deal with super-poisions even the Preomnor can't handle, but the detoxification process renders a marine unconcious for a few minutes
15. Neuroglottis - hightenes sense of tase and smell. Basically a marines tongue and nose are like a chemical analyzer
16. Mucranoid - skin secrets substance that protects against heat and cold
17. Betcher's Gland - an astartes can spit acid/poison
18. Progenoid Glands - no meaningful way to implement?
19. The Black Carapace - increases power armor effectiveness


So..for those of you that know Rimworld code and functions the best - what can be done, how it can be done?

[Thirite]

Almost all of that can be done just with custom hediff classes. For some of that you might need to define a new raceDef altogether (changes to diet and body/organs in particular).