Hi Doug
But the plane was already tested in many machines using VISTA ,and he told me he has instaled other planes without issues ,
in one moment he ask me where should he drag it in Aircraft or in Airplane folder.. ,as fas I know the only thing that has airplane folder is fS2004 ,
Probably he did something wrong and lost a file somehow..that's the only explanation I can see
FSX is the only version of FS/CFS that has an airplanes folder. (Flight Simulator X\SimObjects\airplanes.) All other versions have an Aircraft directory.

I wrotte it wrong above ,I just fixed LOL
The plane was made entirely for all kinds of FSX ,was made using FSX-SDK is compatible and well checked in FSX-,...FSXsp1, FSX-SP2
In all versions works fine , I have 2 pcs Just for test and non activation I install FSX in my second machine to see from my main one details and get them fix in gmax
well the boy seems dissapear , Im gonna send him a letter to see if he found the problem

One thing agree with you its VISTA and many
can come up..
and I'm not going to break my head if he doesn't show up again