There is a vast amount of free aircraft for Flight Simulator 2004 available on the Net, you have found a great plane but is marked as FS2004, how can you convert FS2004 airplanes to FSX? Keep reading. First select your desired airplane, to do that just go to and select FS2004 Aircraft, FS2004 General Aviation, FS2004 Military, FS2004 Helicopters, etc. For example, lets look at FS2004 Military airplanes, thre is an interesting aircraft, Click on the download button and save the zipfile (c130j30_49. Busch Modellbau Katalog Pdf Creator. zip) to a temporary folder. Once downloaded go to the temporal folder, providing that you have Windows XP, Vista or 7, right click the c130j30_49.zip file and select 'open with.' Then select 'compressed (zipped) folders' this action will open the zip file to be explored.