The best solution is to use Share/To Disk and, on the DVD Burn options, select To Folder.
Rather than burning to a disc, this will burn your DVD files to a folder on your hard drive.
Burning off copies of the DVD, then, is as simple as burning the VIDEO_TS folder that's created to a DVD disc. (Not just what's inside the folder -- but the folder itself.)
A good utiltiy, that allows one to specifiy the number of discs burned in a session, plus also the burn speed*, is the great, free ImgBurn.
As Steve says, it's the VIDEO_TS folder (contents will come along) that is what you want to burn.
* I would choose less than the max burn speed. A few extra minutes here, can mean not having to repeat the burn, when Aunt Marge's DVD does not play. Also, I strongly recommend either Verbatim, or Taiyo-Yuden blank media, and never Memorex, recent TDK's or Ritek's, or any "store brand."
Thank you so much, I will attempt and report!
One of the drawbacks that I find with the burning module in PrE, is the lack of control, with regards to burn speed. It surveys the media, and then the burner, and chooses the fastest possible. I am not a fan of burning a DVD/BD at the fastest possible speed, as no DVD player is certified to play any burned DVD, so the best that we can hope for is the ultimate burn, and the ultimate media.