Hi everyone.Has anyone else expereinced the problem I have?? and if they have what did they do to fix the problem..As we know to install PMDG aircraft, we get the message you cannot install until you upgrade to 9.1.. which I did, and then when I tried to install both the 737 Basic package, and the B747-400 Queen of the Skies, warning message on screen, saying that if I was now to install Add On's that will change basic files within FS2004, the Add on will not work... First time I missed this message, installed both aircraft, rebooted computer, and that is what happened FS2004 stop working.. so uninstalled the aircraft grr.. restored computer,. and then attempted to install the update to 9.1 and the message I had was you alredy have it installed??? weird.. eh...So currently I sit with FS2004 without the PMDG aircraft installed, and wondering why, PMDG, would put a message saying you cannot install this aircraft withou the upgrade??? can anyone unravel this for me please...Techie stuff..Vista Home PremiumATI Radeon card4Gb RAM250Gb HDD available capacity over 200GbProcessor speed 3.2GhzRunning FS2004, with all maxium settings.. and I have a average frame rate on the default B737 80fps.. runs smoothly no jerkyness.Long message,, but I hope there are members who can help me out with this one!!!!!!!I have attached the message I got :( RegardsGuildfordUK

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