You'll find a directory on there called "VIDEO_TS". This one holds all the relevant video, audio and meta data. Just copying this one and all its contents across to a new DVD blank should do the trick. If you find an "AUDIO_TS" directory, you could copy that one across, too. It's usually empty on a video DVD, but some older players might refuse to play the disc if it's not there.
Hi,
From Movie Edit Pro 15 you can also use the 'Burn CD/DVD' option from the 'File' menu.
I used this to both burn a copy of a project that I had already created using the 'Burn an already created ...' option and then made a direct copy of this newly created DVD using the 'Copy CD/DVD directly...' option.
This avoided having to go through the complete burn process for a project multiple times to get more than 1 copy.