Hi,

I serach a good converter and also the right settings for convert
a Divx or other source format to the apple mp4.

When I bought my memory card, I have final fantasy VII on it. This movie has
a excellent quality render on this phone and I would like to try to put on my m600, movies or clips with a quality like this

Thanks for any info.

Use that link: http://media-convert.com/convert/index.php
Is possible do a convertion of almost anything on anything else.

Use this instead. Make sure you select mp4, and resize the video to 320x240. keep total bitrate under 700, including your audio bitrate. use ffmpeg encoder instead of xvid.
http://handbrake.m0k.org/

There is also an encoder, called Media Coder. A few weeks ago, I have written a blog posting about how to convert our videos to S60 phones. It is not particularly for M600, but may be you can check it out at http://www.s60tips.com/2006/09/30/converting-your-movies-for-divx-player-for-s60/