If your burner allows bitsetting of DVD+R to DVD-ROM then Nero can do this automatically for you.
In the Burning ROM , take the "Choose Recorder" option & select your recorder. There's an Options box, click that & you'll see the book type settings. Select DVD-ROM from the drop down selection.
My LG 4163B supports bit-setting but it's not permanent so I have to do this but my Benq 1620 allows for permanent setting so I did that with Nero's CD-DVD Speed.
Do as suggested by AzImmortal & establish whether it's possible for your burner. Obviously if it's one of mine then you now know anyway.