Hi I have recently purchased 737 NG. I know there are different versions like Easy,Hard etc of it. How do I change the versions and also I would like to know the difference in each version.Please suggest.Ramana

Ramana: Please sign your full name to posts in this forum and welcome.The 737NG is very different from the default MSFS airplanes, please read the intro section of the manual. The different "versions" are just the variants that Boeing builds; 600 through 900 each one a little larger in the series. As far as Hard verses Easy, there is no difference between the variants in this regard.PMDG has a wiki-based knowledge library, which has a 737 FAQ article that might be helpful for you: http://ops.precisionmanuals.com/wiki/PMDG_737NG_FAQ