using Imgburn, select "Write files/folder to disc"
drag and drop BDMV & CERTIFICATE folders into Imgburn.
Go to options tab and ensure "file system" is set to UDF 2.50
Go to device tab and select a slower burn speed, I prefer x2.4 (less chance of error) but that's just me, as long as your disc is capable of whatever speed you choose.
Burn. :)