how to find DVD plugin key in Nero 6 ULtra

[Ryland]

Nero 6 Ultra and Nero 7 Essentials both use the same DVD plugin and since I have both I was trying to find the DVD plugin key to my copy of Nero 6 Ultra so that I can get Nero 7 Essentials Vision to work with DVD's. I cannot find the key code anywhere though so does anybody know where I can look in Nero 6 to find it?