[willdud]

I belive you open Science.ini then if you dealing with a new faction/army you declair them:

Science SCIENCE_NewRegeim
  PrerequisiteSciences = None
  SciencePurchasePointCost = 0  ; note that this means "not purchasable", NOT "free"!
  IsGrantable = No

Then you just clone what EA has provided making changes to the names:

;; -------------------------------------
;; NewRegeim Sciences
;; -------------------------------------

; --- LEVEL 1 POWERS ---
Science SCIENCE_Mktwo
  PrerequisiteSciences = SCIENCE_NewRegeim SCIENCE_Rank1
  SciencePurchasePointCost = 1
  IsGrantable = Yes
  DisplayName = SCIENCE:NRMktwo
  Description = CONTROLBAR:ToolTipNRScienceMktwo
End

Science SCIENCE_TroopTrials
  PrerequisiteSciences = SCIENCE_NewRegeim SCIENCE_Rank1
  SciencePurchasePointCost = 1
  IsGrantable = Yes
  DisplayName = SCIENCE:NRTrooptrials
  Description = CONTROLBAR:ToolTipNRScienceTroopTrials
End

Science SCIENCE_Anglo
  PrerequisiteSciences = SCIENCE_NewRegeim SCIENCE_Rank1
  SciencePurchasePointCost = 1
  IsGrantable = Yes
  DisplayName = SCIENCE:NRAnglo
  Description = CONTROLBAR:ToolTipNRScienceAnglo
End

and then you goto what ever your science is enabaling...
E.g. Paladin tank lvl 1 science you would go to where it tells the war factory to build tha paladin and type somthing like... i forget exactly but

Requires: SCIENCE_AMERICA SCIENCE_PaladinTank

[EDIT] Disclaimer: Though i could and probably have got somet wrong