I have downloaded some airplanes without panels and then downloaded seperate panels. I put them in the airplanes folder. If they allready had a panel folder i just replaced it. Nothing happened and most of the airplanes didn't even show on the select airplane screen on the FSX menu. Please help!! 😳
Not all aircraft install exactly the same way. If you don't know the basics (meaning you'd be able to figure it out for yourself) - you have to study the (hopefully) included Readme files.
Keep in mind that especially at a time like this - when there is a transition from one sim version to the next - many 'would be-developers' upload all kinds of rubbish just so their name appears in the libraries.
They couldn't care less whether or not you run into problems trying to install their "Creations".