[MacDV] toast to create a VCD?

[Peter van der Linden]

I have used Toast 5 to create DVDs quite happily.
There are two unobvious things
1.  you need to create an empty AUDIO_TS directory if it doesn't have 
one
2.  Use the "Other -> dvd" menu, not the "data" menu.

However, I am not having success with using Toast to create a VCD.
When I select "Other -> VCD" it puts up a dialog box asking me to choose
either "one or more mpeg streams"
or "a video CD image file"

I just have a bunch of VOB files.   How do I encode them into something 
Toast likes?
And what is that something - what does it mean exactly by "image file"?

Thanks,

     Peter