You can use "Open with..." and then use your text-editor again. It'll look the same.
thanks i did that, much appreciated... while i'm at it: does anybody know of a way to make use of the TeamBG dialogue editor? It lets me make .dlg files directly, i was wondering how easy it would be for me to impliment these into my NPCS
EDIT: had the methaphorical shit metaphorically kicked out of me by a few more experienced modders than i, i no longer need help with this issue