DVD Compilations Problem

If I’m not in the correct sub-forum then perhaps someone can point me in the right direction.
Anyhow, I’m trying to upload some music video’s I have on DVD to ‘My Video’s’ folder and in turn burn those video’s using Nero 7 Premium Reloaded.
However, when I try to upload the result is that the video’s (or some of them at least) seem to be split into seperate segments, they are not ‘whole’. The Chapter Menu’s are also, of course, uploaded but I can’t seperate Video’s from Chapter Menu’s. On top of this Nero won’t allow me to drag-n-drop the Video’s into a Menu. Anyone any idea’s ?