FSX addons with FS2004

I know aircraft can not work with FS2004, but can any of the scenery, Mesh, landclass, etc work with FS2004. I don't use FSX yet, but want to keep an eye for the future as I buy add-ons until I do.[p class=dcmessage] BradKELP/KBIF http://home.elp.rr.com/bmbanister/BannerSig_BMBanister.jpg