if your still getting the file not supported error on tmpgenc when you try to frameserve
this solution worked for the problem file i had i had done everything else from all the posts on the forums

when you open the file you want to frameserve in vdub does it come up with a warning about the sound if it does this is what causes the prob in tmpgenc to get round it
you need to save the avi files sound as wav
save the avi itself as an avi file with NO SOUND use whatever divx codec you want it to be (your adding the wav file in tmpgenc )
you should be able to go through the frameserve process using the avi file with no sound and should have no probs with tmpgenc

the easiest way to see if this is the problem is to only save a few minutes of it with no sound and try it if it works your laughing if it dont youve not wasted 3hrs re-encode a file
hope this helps at least one person from launching objects in anger
smod99