Video Converters

I've been using PSPVideo9 to convert my video files for use on the PSP and it is a good program but it is incapable of converting from .nsv (the winamp format) and there are a few of those that I would like to watch on my PSP.

Anyone know of any other programs that would allow me to convert those.

just convert that video to avi or wmv or something commonly used by another encoder and then use psp video 9 to convert videos fro your psp