ok so i understand that you have NCR, CL, and MR. H or you can just fly solo. ultimately im siding with the NCR however i figured i could make everything easier if it was just NCR vs. CL and take out MR. H. so i killed him but now my question is with YES MAN. once he is installed on the lucky 38 mainframe can i just leave him be and continue with things that go boom? would going to the fort and getting the robot army futher anger NCR? should i have not killed house at all? plz halp

Yes, you can turn on the robot army. You'll be warned before the NCR start getting angry at you.