You will need SKD for building .deb packages. You can read an instruction on building package at: http://wiki.maemo.org/Documentation/...eveloper_Guide
You can also refer to https://wiki.ubuntu.com/PackagingGuide/Complete there is a lot of useful information on building .deb packages.
After that see http://wiki.maemo.org/Uploading_to_Extras-devel for instructions on how to upload your package to repository.
I recommend using /home/user/.stardict/dic as it is on 32Gb card. /usr/share/stardict/dic is in internal 256Mb memory.
You can also add your own path to dictionaries at stardict plugin configuration.