A little late (and I hate wavelab too) but there is an easy way to get the montage going if you've already tracked in CDWave. Here's my cheat sheet
1. create a cue sheet that refers to the 24 bit file (use CDWave)
2. file, open, import cue sheet as audio montage
3. set mode to dvd-audio, add track titles if you want them in the menu (under the DVD-A tab) and save the montage
4. file, new dvd audio project
5. click on the green + sign to add the montages
6. functions, settings and set the title – keep it short so it’ll fit onscreen
7. set all the menu stuff up (view safe area)
8. Save the project
9. function, create and set to ignore so no plugins will be applied to the data
The reason I'm still doing this is because I record in 24/44.1 and have a DVD-A capable player so I can get my 24 bit without any SRC. I suppose someday soon I'll cut over to 48k (or 96).