ScummSpeaks has a menu option that will let you import the text back into the game (using scummtr). When you select it, it should show a popup dialog with the arguments that will be passed to scummtr, and then run scummtr in the background.
Does this menu option not work, or do you think the arguments to scummtr (that appear in the popup dialog in ScummSpeaks) are incorrect?
If you get stuck, I suggest you look at scummtr's help by just running it without any arguments (or with the "-h" parameter). e.g.