Need help W/ Scenery installation

I've had to reinstall my FS2k2. I wish to reinstall the "Real Scene 2004 / USA Terrain & Landclass Data Sets". There are two files in Question; "Addon Scenery" and "Scenery". Both end up inside with "scenery" however ; the files inside each are different . Where do I put them ? Any help would be appreciated. I also wish to use this scenery direct. Thanks much. caveman