Divx with one AC3 audio track and two commentary tracks, possible?

[xerox]

I am planning on encoding a movie with the main audio track in AC3 format, and the two commentary tracks as alternative audio streams.
Is this possible, or do I have to settle with only two audio tracks?

Any tips on how to do this would be appreciated :)

[DasViper]

Unfortunately you can only have two audio tracks in one AVI-file.
Were you planning that, because of short movie length?

[xerox]

It's 113 minutes.
Guess I'll have to settle with one commentary track then :)