Hey Silvio
Ok so heres what ya need "well that works for me"
1st find the WinAvi Converter / converts AVI, DVD, WMV, VCD etc.... to what ever you want, great proggy to have to convert!
You can get it of software sights that you can DL from, or use a Torrent Program like UTorrent or Azureus and get that installed on your PC then lastly go to ISO Hunt and search for WINAVI CONVERTER I like the Torrent and ISO way best.
Once you have the Program you can convert the file you have to DVD etc.... and open your nero click DVD, choose DVD-Film or VIDEO versions very, click on all the "CONVERTED FILES" that you did with WINAVI .
When I get back home I will add a few links if your still snagged!
hope this helps
cheers
leafland