works for me, though I only use a single image, and I use virtualdub experimental.http://virtualdub.sourceforge.net/
grab the experimental build.
is there anything in particular you use vdbumod for? I used to use it because I think it can open mpeg files or something, but with input filters plain old virtualdub will open just about anything.
Have to say though, I'm starting to like avidemux
a bit more because it offers way more output formats for stuff like phones, youtube, xbox/ps3 or mkv.
edit: I just tried it in vdubmod, worked there too.
This is what I did
get image -> make copy -> name them image 1.jpg & image 2.jpg
open image 1.jpg in vdubmod
streams -> stream list -> add some music
video -> frame rate -> adjust so audio video duration matches
audio direct copy
export to mkv
open in media player classic