I was wondering if players can support 320 or 384 kbps in kvcds. Would this sound better than using 224 and 192 and so?

Thanks

Why would you want to go so high
You'll be creating a huge .mp2 file, which will lower your CQ for your video part.
You really don't need to go over 128Kbps for movies. As a matter of fact, I do most of my KVCDs at 112Kbps with Dolby Prologic II audio, and the sound is great. This leaves more space for the video stream.
And in reality, audio encoded with HeadAC3he at 192 or 224, you'll probably won't even notice the difference between the two.

-kwag