Hi AndySeems we are both having fun at the moment. Have got FS back up and running and have started to install add ons.
Have a look at your scenery.cfg folder in FS2002 and see what path is shown in area 121. Then see if the scenery is where the path says it is.
You should have a scenery.cfg.bak in your FS2002 folder and you could take a look at this to see what has changed since you did the last addon.
Kind regards
Bob