Thank you very much for the information. Right now, I am not sure whether to invest more time in the Japanese dictionary. As it is now, selecting text in a Japanese book is so cumbersome that using the dictionary is rather a pain. One can only hope that this improves with a future update.
I was hoping somebody else would go this way, so that I could easily follow his steps. Anyway, if I were to create a new dictionary (and at the moment, I don't have the necessary knowledge to do it) I would possibly also wish to replace the content (I mean the html files) completely. Thank you again.