Video Guest Book - DVD Authoring - Software wanted

I am adding a Video Guest Book to my photo booth business. I use Sony Vegas for my video editing. I am looking for some software which would do any or all of these:

- Allow me to drag all the files to the timeline and apply transitions. I can do that with Sony Vegas but am listing this as part of my wants.

- Have a DVD menu which allows me to drop all my video clips into it and have it display a thumbnail showing the first frame. Ideally, I'd like to drop in 50+ files and have it build the entire menu. I can do this individually with DVD architect but if I have a 100 clips it will get old fast.

I have looked online but all I am finding is the user interface piece and not the back-end.

Any one have any ideas?

Thanks in Advance