Are you remaking FF7 for the DS?!?!
-No, not as such. I'm writing a games engine for the DS which will have all the normal features in it - 3D battle sequences, 2d backgrounds, music and sound effects playback, scriptable conversations, etc etc. I'm currently using FF7's models and graphics to test/develop it because they look reasonably good and are about the right level of details/complexity for the DS to handle.
The engine will be released at some point; certainly it would be possible for other people to stick their own content, be it FF7 stuff or not, into the engine, but I'm not going to be offering downloads from my site containing (copyrighted by Square!) FF7 material.