Thank you, especially for the v1.6 firmware.
Additional info: these dictionary files seem to be more up-to-date:
EDIT: I just expanded their eng_deu-dictionary, and the files themselves (not the archive) were last modified on 10 Dec 2000. Booxtor's eng_deu is from 30 Jan 2009.
So I guess the dictionaries linked by Booxtor above seem to be more up-to-date after all.