[Temhil]

yes it is explained in the wiki: http://code.google.com/p/tinymediamanage.../Moviesets

I tried the option 2 yesterday and it worked without problems (created my own movie set then added movie to it):

"You can simply add a new movieset by clicking the "add" button in the movieset panel and inserting a name for it. After you added a new movieset, you have two options to add movies to a movieset.
...
Option two is to manually assign movies to a movieset. This can be done in the movie edit window. There is a new option called movieset where you have a dropdown with an empty movieset (to unassign) and all moviesets. Just choose the movieset and this movie is assigned to the movieset."