If yor file is in AVI format, which is normally the case with Limewire, then check out the guide by alkohol in my sig, follow it and you cant go wrong( even does mpeg the same way)
The prog that alkohol is using is Nero7, however exactly the same process using Nero6, just different pictures. Do you have NeroVisionExpress in you Nero6 prog.
The examples are from Nero 7, i use Nero 6 as well so what you're looking for is Nero Vision Express. Follow it carefully and you can't go wrong.
Go to this link and see if you can download NVE3 from here http://www.afterdawn.com/software/video_software/video_tools/nerovision_express.cfm