Hi, I was wondering if my having the pmdg 747 installed before the pmdg 737ng and -800/900 would make my 737 perform poorly. I ask this because I did have the 747 first and then bought the 737 and my 747 runs on my system well, but the 737 doesnt at all, and it's really bugging me. Thanks for the help!Paul Schmitt

Paul,I think this will help you:http://ops.precisionmanuals.com/wiki/PMDG_...7-400.2F400F.3FCheers,