I have alot of .flv files i want to play on my Curve 8330, now I can convert each one to 3gp and MOST of them will work, however, while the video quality is acceptable the sound quality SUCKS. I've looked at the FAQ section and there are other formats that my Curve 8330 will play, however when converting to these formats no matter how precise I am with the conversion parameters, they will not play on my Curve. Any suggestions? Any good programs out there for this sorta thing? If I could get the sound on 3gp files to be better that would work too.

Try a forum search. There are dozens and dozens of post here about that very subject.

i used to use media coder but i keep getting a ffmpeg error now and it doesn't like to work.

Use Total Video Converter and convert them to MP4 instead of 3GP