Your problem is a very common problem that most of us have encounter. You just have to many planes in your Hangar.
Better said you can only have install or at any one time in the Aircraft folder no more than 95 to 100planes.
Yes you can install more than 100 planes in your program but in different Hangars.
As for weapons. When ever you install new weapons you have to remember to go the your aircraft the weapon where intended for and go inside the the aircraft folder and look for a file call CDP and delete it before flying with the aircraft. Do not worry this file will be replicated automatically by the program.
As for Hangar and flying with more than One hundred plane. You can always install this little but important program that will allow you to able to fly with more than hundred plane in different Hangars.
Its located here.
http://fly.to/mwgfxIts call ACman and through it you will able to have up to eigthteen Hangars per install CFS2. Just remember you need the Stock planes for you to be able to activate each new Hangar.
Now you will be able to have up to Eighty new planes per new Hangar.
I hope have been able to help you out.
PS please remember to backup every thing up. This way you will avoid lots of headaches.
If you really want to improve your experience thruogh this program take a look at this post put together by many member for the benefit of the communitty. Check it out.
http://www.simviation.com/cgi-bin/yabb/YaBB.cgi?board=cfs2;action=display;num=11...James007