Hi,Today I bought the expansion pack for the NGX 800/900 to add the 600/700 models. I downloaded it and ran the instillation by the books. However; the installation quickly informs me that the location of fsx.exe is unable to be found and therefore cannot install. I understand what this is saying and I have double checked the directory 1 million times. The NGX 800/900 installs no worries with SP1c. I have used the FSX registry tool from flight one and that is no help. I have used all available resources and there just are no answers... please help ! Directory address:C:\Program Files\Microsoft Games\Microsoft Flight Simulator Xand i can clearly see the fsx executable file!I have been looking around for a forum which has solved this issue so far and there definitely are no current posts that have the adequate solution I am needing.Cheers AngusM