I am looking for a program to design my own airplanes but I have no clue where to look and which one to use.

Which sim do you want to make aircraft for? If it is FS2004, you have gMax on your cds. Look on your Disc1 for a directory "extras". In there is a directory named GMAX. Run the .exe in there and your installed. Then hurry and go to:http://www.turbosquid.com/Support/Index.cfmand get a registration code. Today is the last day, I think. Then go to: http://www.microsoft.com/games/flightsimul...wnloads_sdk.aspand get the GMAX_SDK and Makemdl_SDKs for the exporter.If you are working for FS2002, go tohttp://www.turbosquid.com/GMAX/and download the program, tutorials and help files. Install and get the registration code as above. For FS2002, you will also need the exporter,FSModelExp.dle and makemdl.exe from the FS2002Pro install. Upgrade Makemdl.exe with the FS2002 makemdl from here:http://www.microsoft.com/games/flightsimul...wnloads_sdk.aspThen read and learn the program :)Lou