Every time I try and join avi files using Nandub part 2/2 sound always seems to be out of sinc, is there a more reliable proggy out there as yet or is nandub really the best prog to use?

Try VirtualDubMod, it has all the features of nandub (minus SBC support) plus heaps more.

Presumably you are only joining it to re-encode to DVD (otherwise you would not have posted it in the DVD forum) so you could just join the files with AVISynth.

I,ve just tried out that proggy you suggested and got the same result as nandub, I sure that that tool is capable as proberly nandub but I don't know what setting to use. All I do is open VirtualDubMod click FILE> open video file, find my avi and hit open, I then go to FILE > append segment, and click on part 2 of the file and open. Then Video tab and click on direct stream copy and I leave everything else along. Then I would click FILE save as give it a name as press SAVE !!! Then part 1 would be sweet as a nut but the second part is always out.

Why is the format of the audio stream(s)?

Divx WMA Audio V2

Did you try using AVISynth?

I've never used it before !!