I'm using gw with my dumped Rom though I'm not entirely sure how to get online
you get an error?
you will probably have to force the user agreement to 'accepted'. you can do this with the dev tool 'config'. it's out there somewhere, it's a .cia file.
i honestly can't tell you where, i don't know because i have not used it myself, but google 3ds dev tools, dev sdk, etc, and i think you should find it
we are not allowed to share it on this site.