It should work just like for XMM...
Just copy the database file whereever you want. Then copy all the subfolders into the folder containing your database file.
Keep sure that the .mdb and the prefix of the subfolders are identical.
After that you only have to open your database within XMM.
I've already done that with eXtreme Movie Manager several times and it always functioned without any problems.
any folder (has to contain):
file [dbname].mdb
folder [dbname]_cover
folder [dbname]_download
folder [dbname]_mediacenterdir
folder [dbname]_photos
folder [dbname]_thumbs