Firstly, I would like to thank every1 for their contribution to make flight sim such an amazing experience.I have bought the PMDG 747X for FSX. I can run it on FSX without any problem.I wanted to check if it is also compatible with FS9 because my FPS is much better in FS9 than in FSX due to my old system. Any info is much appreciated... Thnks

Hi there and welcome.There are two different PMDG B747-400s. One is for FS9 and one is for FSX. The FSX one won't work in FS9 and visa versa.You may already know but you can find here at AVSIM the PMDG support forum where there are many people happy to do their best to help with any issues you may have - sorry if you do know this - just a friendly note :-)Best!