I have a wierd problem.
I have celeron 400 mhz processor,128 mb ram.
So divx files generally don’t play well(video becomes slow)in my computer.
But I found Divx3 low motion files are playing quite well with video and audio in sync.So is there any way to convert files to this format?Because I saw that these files don’t occupy much space too. 
Open the file in VirtualDub (http://www.virtualdub.org), click video, compression, pick divx mpeg-4 low motion, click configure and set it to your liking, then click file save as avi.
well there is a problem.I checked in virtual dub and i didn.t see any divx mpeg4 low motion.
I saw only 3ivx codec,xvid mpeg 4 codec,ffdshow and so on.
please help
By the way you stated your problem I assumed you had divx 3 on your system already. Download it here
http://www.divx-digest.com/software/divxcodec.html
docent113@gmail.com