I downloaded this yesterday and fiddled around with it for a while. I'm really impressed, this is a killer ap for the 770. I found that if you used the preset Nokia 770 resolution but went into the advanced settings and set the stretch to 40, it perfectly filled the screen. Looks awesome. Don't forget to go into advanced settings and change the default from mono to stereo and set pass to 2.

UPDATE--

I've done some more testing on this software and found the settings that seem to work the best. Your results may vary.

Set resolution of the Nokia-Nokia770 default

set kbps to 500 for large size/high quality (ie a full length DVD will take up about 550 MB, 400 for medium size/quality (DVD will be about 350MB) or 200 for small size/poor quality. It depends on what your needs are-- I have two 1GB memory cards so I can take lots of stuff on plane trips. If you don't have big memory cards you will be limited.

Set audio to stereo and framerate to 15, pass to 2, and stretch width to 40 for full-width video.

Works great!