Originally Posted by sigsgev
I was wondering if there's any tool that allows copy/paste of dialog nodes between DLG files. If there's a way right under my nose that I am missing, please consider this a noob question
Tragically, no. tk102 doesn't use the Windows clipboard for his *.dlg editor - unlike with K-GFF. For this reason, you cannot copy between dialogue files. You could post a feature request in his thread here.
I don't know how likely a reply is, tk102 hasn't been around in a while.
Edit: Ugh! I can't believe I forgot to mention this. Open up your dialogues in K-GFF, it will look a bit strange, don't worry. Scroll down to the entry you wish to copy and paste it into the other file. It is not a precise art.