Bossy - I can buy right now, FSX, PMDG and a bunch of software to make the weather and terrain VERY REAL, and a whole entire yoke and rudder system, I was going to get it, but I didnt..heres a tip: Spend your money on REAL flying....maybe after you get your Private, you can have a simulator and also fly irl but now, just focus on reality. Flying 777's and 737's PMDGS, even though VERY FUN and real, wont help you in private training in a cessna or whatever prop engine you may fly...just a piece of advice.
BUT, if you are set on it...I heard PMDG 777 can work with the steam FSX..I do have steam FSX. Idk look up PMDG on steam FSX. Have I mentioned this to you guys? March 5th Im flying

(InshAllah)