Capn Trips

First-time poster. I have searched the forum a bit, but am still a bit unfamiliar with all of its nuances, so I apologise if I'm in the wrong forum or section. I have a ready-to-burn VIDEO_TS folder with 9 .BUP, 9 .IFO, and 23 .VOB files. They total 7.23 GB. How do I split this DVD into two smaller VIDEO_TS folders so they will fit on my single layer 4.7 GB capacity DVD-Rs?