Gary Buska is right on the mark too.
I took 2 weeks once about 3 years ago and did nothing but study how the File & Folder layout structure was set up in FSX,,,
I then went thru a testing phase of myself to see if I could do it properly.
Then I asked myself, how can I do this better, make a better mouse trap, more less to make sure Files go where their supposed to go, without any mistakes & confusion.
I used to always install straight into the Aircraft or scenery folder without a 2nd thought, thinking everything would just go where their supposed to go, hey, its a computer !!!
Well, I learned differently as time went on.
that's why I ended up taking the time to really dive into educating how it works.
I now download every single download to a totally separate folder away from FSX Flight Simulator, that folder can be anywhere you want it to be , outside of the Flight Sim. Then, I thoroughly inspect every file , especially the Panel Folder for Gauge files, and I've caught quite a few gauge files that were for Flight Sim 1998 or earlier stuck in there, that I've removed. other wise ya get pop up windows, even tho the title says on the download its for FSX, doesn't mean much really.
I also got really good at inspecting the Aircraft CFG Files for error entries, I've found a few, usually in the SIM= section which will cause an aircraft to NOT show up at all.
It just takes a while to learn, but so worth putting the time in to study everything, makes things a lot easier for you !
Unfortunately for me, I kinda got addicted to seeing how many Aircraft I could have in my hanger and how I can Tweak them to make some of them work in FSX, lotta hours playing around with that, I'll tell ya !
Aircraft in my FSX Gold/ Acceleration sim to date 11/19/2013 : 4,879 Aircraft including a few Heli's to.
Now I keep some of those Aircraft in a completely different folder away from FSX, kinda like another Separate Hanger, then when I want them, I just copy and paste them back into my Main FSX Aircraft Folder, and Presto' go flyin.
Reason is, I had so many Aircraft in my sim, it took forever to Load the Main Menu at Start up, like 7 minutes maybe a little less,,,,
so I played around with creating a separate Hanger outside of FSX to store them all in, once that happened and I transferred 80% of the Downloaded Aircraft only, it sped up the loading times of the main start menu.
HOWEVER - be WARNED, you "Don't Want" to Transfer any of your "Original DEFAULT Aircraft" out of their positions with in the Sim Folder/ File structure when creating another Fantasy Hanger, reason is - if other Aircraft in your simulator rely on the Panel & Gauges for that Default Aircraft, and you transfer that Default Aircraft out of it respective place in your sim, then many other Aircraft may NOT properly Display any cockpit and or Gauges in some of your other aircraft that "DEPEND" on the "Default" Panel & Gauges !!! so be very careful which Aircraft you choose to store elsewhere , away from the sim.
I learned to just KEEP all Original Default Aircraft in their respective places, because so many of my other Aircraft rely on a Gauge or Panel somewhere down the line.
I found out that I couldn't rely on just whatever was in the Main FSX Gauges folder, that was a hard lesson learned and twisted too !
I now end up painting a lotta Aircraft too, using 5 different paint programs.
Paint Shop Pro
Microsoft paint
photoshop
Paint.net
Abacus Paint
DXT Bitmap converter
and some other paint program I can't remember now.
anyhow, for all those who think its a hopeless venture to enjoy flight simming, its NOT really, take time and paintence !!!
well worth learning and a few frustrations along the way !
enough of my rambling !
Jetranger