Bonjourno, Hey and Hello.
If you're trying to get your *new* custom continent in Noggit then you need to place the DBC Files in a folder in your WoW Directory in a simple Folder called 'DBFilesclient' whilst your WTDs and ADTs get packed into an MPQ patch called 'patch-4.MPQ' this should then be placed into your data folder within the wow directory.
Important to note as well: that within the patch-4 MPQ file, the tree path for your ADTs and your WTDs should look like this: patch-4.MPQ>World>maps>Mayrai Forest>Mayrai Forest.wdt/Mayrai Forest.adts...etc...
Edit: I'll send you a screenshot of how mine looks and I'm on the latest noggit3 and its working. But I think explained it quite well.