Yes it is but in order for other people to see them they have to have their aircraft folder structured identical to yours. Strike Fighters doesnt transfer skins say like iL2 does (so far who knows down the road). It works a lot like FS2002's aircrafts and skins to where every one who you are flying with must have the same skins in the same named folders and such. For squads its not as big a deal since the CO of the squad can setup a certain aircraft folder structure and skins that each member would jsut haveto download and put in the objects folder.