Codex for registration avi dvd burner 08

hi guys

i just downloaded avi dvd burner 2008 and converted my avi file into a dvd file which worked out perfectly. but i need a codex because when i watched the film there was always that annoying writing: unregistred version. how do i get this codex for the registration?? thx

Buy it.

well would be an option but i guess not the best one, thx nevertheless