Peter's suggestion is excellent. If you place your markers in Vegas/Movie Studio and then port the finished movie to DVD Architect with the markers attached, it will save you having to tweak the marker positions in DVD Architect.

If, on the other hand, you place your Scene/Chapter Markers in DVD Architect instead, you'll need to ensure your markers are placed over one of your movie's i-frames. (If your markers are not, they'll displays with a yellow exclamation mark on them.)

MPEG video doesn't include the full picture in every frame. That's why they're so small. About every five video frames they have an i-frame -- a frame of video that includes all of the video's data -- while the next couple of frames re-use as much of the picture data as possible. Make sense?

If your markers are showing up with exclamation marks on them, you need to tweak their positions in your movie a little. (Just a nudge will often do it.) When you nudge your marker, it should snap to the nearest i-frame and then you won't get that warning when you try to output your disc.

If you want to know more about the program, you may want to look up my book on Amazon. Or you can check out my free three-part Basic Training tutorials.
http://muvipix.com/products.php?searchphrase=dvd+architect+basic+training&btn.x=0&btn.y=0

Personally, when I get this prompt for the layer break, I just add a chapter in DVDA. Keith, you add the chapter/marker by positioning the curser between those 2 time points DVDA has suggested and type 'M' on the keyboard - exactly like you do it in Vegas. How is it easier to re-render the whole video Peter? Moving the cursor on the DVDA timeline is easy isn't it?? Nudge it with the arrow keys for real accuracy.
Bear in mind the info on i-frames Keith.

I have avoided DL for a long time, but I found the layer breaks from ImgBurn to be much more reliable, using my DVDA prepares.

"How is it easier to re-render the whole video Peter?"

I can see more easily what I am doing in Vegas and I don't need to worry about i-frames.

I try to put the break at the start of a new scene if possible. In not, then I have to find a spot where there is little movement and dialog. Much easier to do in Vegas.

Remember that you can zoom in on the timeline in DVDA just like you can with Vegas, right down to showing each individual frame if you wish. This makes it pretty easy to find a good spot for the marker.

As Cien sez - you can be just as accurate in DVDA. Bottom line is maximum 30secs to place a marker on the DVDA timeline versus however long re-rendering in Vegas takes. I'm guessing substantially more than 30secs!

Question for Steve; I have a vague memory of a type of marker used just for the layer break. The player will ignore it if skipping through with the 'next' button. Was I dreamin'? :-)

Also, Keith, be aware that by adding a marker, all markers assigned to a menu button AFTER that one will be moved along one. You'll need to reassign them.

On the other hand, if you really do want to do this in Vegas it's not necessary to re-render the video. DVDA has the ability to import markers. Sadly Vegas doesn't have the ability to export them, but you can come close. Simply render the audio to a new file that can contain markers, then in DVDA import the markers from this new file. Audio renders take very little time at all.

Yes, I have DVDA set up via the internal prefs to accept markers in audio files. It suits my workflow.

When you render from Vegas, you can select to have i-frames at markers.