How do I read existing .DLG files in .D format?

Near Infinity is great for reading the dialogs and trees, but I would like to be able to read the existing DLG files in .D format to help me figure out how to write things. Supposedly WeiDU can decompile .DLG files into .D files so one can read them, but even following the guide I can't get it to work.

Any suggestions? What's the best way to read in-game dialogs?

Thank you.