Hi Andy,
Did you start your IfoEdit already?
You don't use BBMpeg to mux KDVD. You use IfoEdit
Ok, just go down the menu to "DVD Author" > "Author new DVD".
A new windows will open up "DVD Author / Multiplex".
On the right margin of the new window you will see some small square button with a minus sign inside.
Each of these buttons relates to "Video", "Audio", "Subpicture", "Scene change/Chapter"
and "Output stream destination" as you can see on the left margin of the window.
This should be very straight forward. You don't need to specify any "Scene change/Chapter" for
your movie but you can if you want.
That's the part I can't help you because I don't use it and I don't know how to do it.
You will, though, find lots of help on the doom9.org forum.
Now for the tricky part: after you select your movie files you can see their path on the
"DVD Author / Multiplex" window. Click on the AC3/MP2 path and you can select it's language
using the combo box on the left.
Do the same for your Subpicture path and be careful as there are 2 combo boxes on the left.
The 1st is for Audio and the 2nd for subpictures.
Be a sports and tell us your results
C ya