So I were looking at this tutorial and I got stuck at this place :S I don't know how to pack all the stuff into a patch and what do you mean by ''patch''?
Pack your new DBC,wdt and adts into a patch and now you should be able to port your self in the new instance.
At this point noggit won't show up your new instance because you will have to put the Files also in the wow folder and not in the patch beacuse noggit sets the priority of the dbc files to those who are extraced into your wow folder.
So just take the dbc,the adts and the wdt files and put them in to the wow folder like this:
For adts:
wowfolderworldmapsyourawsomeinstancename
For the dbc:
wowfolderDBFilesclient
:S