The dictionary files should be located on /hdd3/dict1 and /hdd3/dict2
They are there by default, ie if you first open your C3100, they are there, but if you do a factory reset, then the files are gone and you need to copy them back from CD1 (contains dict1) and CD2 (contains dict2)
Obviously, the C1000 does not have /hdd3 and thus has no dictionary (besides, it does not have the space for it since the size of the dictionary is about 800MB)
and btw, there is nothing wrong with my package. it does not remove those files. i just installed them myself on my new 3100 and i have no problems with the dictionay or translator.
one thing i would do is to change the order of the dictionaries, put genius as the first book so you get the cute japanese sounds