Hello old Buddy, If you go to the download page on the main DCS page for the AH-64, I think is either utilitys or Mods and find the page on Abr and down loaded and see. Is like AG is general airport and so on.
By the way i quit playing the Fps hog AH-64h, And went back to my A-10c where i get 32 to 35 fps with steam vr on auto DCS vr on 2.4 pitool on 2 like you said, MSAA on 2 no grass and no details but, Shadows on high so my cock pit looks ok.