Ok, I need the DivX 3 codec (fourcc: div3) alone. Don't want to install codec packs, don't want to install DivX (because I use Xvid), is there just any way I could install it alone?

DivX 3?!

how about this? DivX Free (http://www.free-codecs.com/download/DivX_Free.htm)

This won't interfere with XviD?

Anyway, I'm gonna edit this when I have results.

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Well everything seems to be working. Thanks

looks to me like it's only one codec "DivX 5"

"This is the latest version of the codec DivX 5 ! The best and the most used codec in the world ! You need to install this software if you want to encode a divx5 movie or if you want to see a MPEG 4 movie."

Changes from DivX Free 5.2 to DivX Free 5.2.1 :

• New:
- Installer option to enable generic MPEG-4 playback component
- Support for Microsoft Windows XP Service Pack 2
Includes DivX Player 2.5.5
• Fixed:
- The update application to allow update checks when system locale is not supported
- The registration application to notify the user when they are already registered
• Fixed (Encoder):
- A long pause which occurred after opening the codec configuration dialog
- A 1-pixel vertical wobble when de-interlacing source
- An issue where the codec could forget its '6 month trial' status
- A glitch where Pro features were still selectable, but unusable after trial expired
- The trial expired message to show every time a trials expires
• Fixed (Decoder):
- A rare crash that occurred with some types of content
- Black distortions which appeared during playback
- An issue where blocks were skipped when video contained multiple consecutive B-frames
- A stall that occurred with some media players during DivX playback or on exit
- An issue causing Explorer to run slowly when showing thumbnails of DivX files
- The Japanese Decoder Configuration to no longer show corrupt text

no problem at all..

You're quite welcome