NuMenu was designed to reduce the menu sizes, remove unwanted language streams and remove unreferenced vobs (known as dummies - often in the VIDEO_TS.VOB). However, once imported into scenarist there is no reason why some bits can be removed/added - if you know what you are doing :D . Just remember the run the menu.update.bat file, which will amalgamate the new menu info and the original title info into a useable ifo.