I believe you can use the CFS2 ships in FS2002 and FS2004. It would require some work though and this is just theory as I have not done it myself.
First, they are much like AI aircraft. so you would have to build aircraft.cfg and air files for each. Next make an airport with 1 parking spot to place the carrier in and set it up as a static AI aircraft. If things work this far, see if it is landable. If not, then you would have to place a runway in the location of the landing surface of the deck.
The reason I think it would work with some fancy airport building is that I have copied one of these ships to my FS2002 aircraft folder and changed the file named ship.cfg to aircraft.cfg and then I could see the ship in FS Repaint.

Lou