If anybody still reading this post, i have another problem.
I have divx movies that the gspot tell they are in XVID/DX50 format.
Divx codec is automatically used, and then i see green lines across the pictue.
When i use xvid (after uninstalling divx) , it's fine.
Now, can i make somehow the DX50 files to be open with the Xvid codec (while divx is installed) ???

Thanks,
Sagiv