How to add scenery .bgl files?

Ok, I moved the fsgenesis files over to FS2004 according to their tutorial. Look great - same as FS2002. However, when I tried to move several flatten switches for lakes over, FS2004 first said it was loading new scenery and updating its scenery database, but the switches did not work. Further, they do not appear in the scenery library.I put them in a folder called 'Add on' in the scenery subfolder of FS9, and the actual switches reside in a subfolder of 'Add on' called 'scenery'. Same file structure as in FS2002.