Supposedly(sorry for my bad english, I'm a damn mexican) divx 5 codec handles all the previou formats. One thing thoug i have some anime ovas encoded whit divx 3.11, every thing were fine with the 3.11 codec until I upgraded to divx 5 pro,the sound doesn't work, even with the "handle previous divx formats" option selected, you will need to install divx 5 for exteme quality compression and divx 3.11 only if you want to see anything encoded with it(to fix this encoder issue, when installing divx 3.11 select NOT TO REPLACE THE SOUND FILE THAT IT PROMPTS, the one that have the codec is hacked) Greetings from Mexico... Ascii (~_~)