Sounds like what you really want is just a simple set of playlists??
Right-click on the playlist section in the left pane of the ML view, select "New Playlist", and provide a name. Then just drag songs to it from the ML.
If you want to use a smart view based on say, genre, to get the playlist started, then just create your smart view, enqueue it, and from the playlist editor, save it to a file. Then in the playlist section of the ML, you can choose to "Import from File" to create the ML playlist that you can drag more songs into.