fs 2002 missing aircraft

I downloaded 4 aircraft last week. The twal-1049g, p51, lake renegade p36, c152_ccsog p5, and the warrior II p2. The last time I downloaded aircraft was 2009 and I did not have any problems. I followed the same procedures this time and only the renegade made it to the simulation. They all show up in the a/c folders. Any suggestions?