How do you get rid of an aircraft after you have downloaded it into FS9?
Download the first one on the top of the page!
➡ http://library.avsim.net/search.php?SearchTerm=AddIt+6.5.4&CatID=fs2004&Go=Search
easy, you just delete it like anything else by right clicking on the folder and pressing delete (if thats what u mean) 😉